I've spent countless hours trying to figure out why I'm able to emit IR using my USB-UIRT connected to my Raspberry Pi that is running Raspbian Wheezy(3.2.27+ #250 PREEMPT). Successfully tested the hardware on another computer.

I installed lirc via "sudo apt-get install lirc" and can verify receive IR is working by creating a remote config file using irrecord and then using irw to verify that the learned commands are detected. But I'm not able to emit IR, instead irsend returns:
irsend: command failed: SEND_ONCE NewRemote KEY_UP
irsend: transmission failed


If I run lircd with the --nodameon command, there are some errors, but I haven't found a solution online. 
lircd-0.9.0-pre1[5562]: accepted new client on /var/run/lirc/lircd
lircd-0.9.0-pre1[5562]: uirt2_raw: checksum error
lircd-0.9.0-pre1[5562]: uirt2_raw: UIRT version 0905 ok
lircd-0.9.0-pre1[5562]: uirt2_raw: UIRT version 0905
lircd-0.9.0-pre1[5562]: uirt2_send: remote not supported
lircd-0.9.0-pre1[5562]: error processing command: SEND_ONCE NewRemote KEY_UP
lircd-0.9.0-pre1[5562]: transmission failed
lircd-0.9.0-pre1[5562]: removed client


Here is my hardware.conf
# /etc/lirc/hardware.conf
#
# Arguments which will be used when launching lircd
LIRCD_ARGS="-d /dev/ttyUSB0"

#Don't start lircmd even if there seems to be a good config file
#START_LIRCMD=false

#Don't start irexec, even if a good config file seems to exist.
#START_IREXEC=false

#Try to load appropriate kernel modules
LOAD_MODULES=false

# Run "lircd --driver=help" for a list of supported drivers.
DRIVER="uirt2_raw"

# usually /dev/lirc0 is the correct setting for systems using udev 
DEVICE=""
MODULES=""

# Default configuration files for your hardware if any
LIRCD_CONF=""
LIRCMD_CONF=""


And my lircd.conf created by irrecord:
# Please make this file available to others
# by sending it to <lirc@bartelmus.de>
#
# this config file was automatically generated
# using lirc-0.9.0-pre1(uirt2_raw) on Sat Feb  2 21:34:49 2013
#
# contributed by 
#
# brand:                       NewRemote
# model no. of remote control: 
# devices being controlled by this remote:
#

begin remote

  name  NewRemote
  bits           13
  flags RC6
  eps            30
  aeps          100

  header       2674   744
  one           469   360
  zero          469   360
  pre_data_bits   24
  pre_data       0x1BFF83
  gap          66500
  toggle_bit_mask 0x8000
  rc6_mask    0x100000000

      begin codes
          KEY_UP                   0x1BE1
          KEY_DOWN                 0x1BE0
          KEY_RIGHT                0x1BDE
          KEY_LEFT                 0x1BDF
          KEY_SELECT               0x1BDD
      end codes

end remote


lsusb shows the device, as expected.
Bus 001 Device 013: ID 0403:f850 Future Technology Devices International, Ltd USB-UIRT (Universal Infrared Receiver+Transmitter)

And dmesg doesn't indicate there is anything wrong:
[116119.991487] usb 1-1.3.3: new full-speed USB device number 13 using dwc_otg
[116120.096829] usb 1-1.3.3: New USB device found, idVendor=0403, idProduct=f850
[116120.096884] usb 1-1.3.3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[116120.096903] usb 1-1.3.3: Product: USB-UIRT
[116120.096915] usb 1-1.3.3: Manufacturer: FTDI
[116120.100488] ftdi_sio 1-1.3.3:1.0: FTDI USB Serial Device converter detected
[116120.100706] usb 1-1.3.3: Detected FT232RL
[116120.100726] usb 1-1.3.3: Number of endpoints 2
[116120.100740] usb 1-1.3.3: Endpoint 1 MaxPacketSize 64
[116120.100755] usb 1-1.3.3: Endpoint 2 MaxPacketSize 64
[116120.100768] usb 1-1.3.3: Setting MaxPacketSize 64
[116120.103362] usb 1-1.3.3: FTDI USB Serial Device converter now attached to ttyUSB0

lsusb -v -s 001:024 shows:
Bus 001 Device 024: ID 0403:f850 Future Technology Devices International, Ltd USB-UIRT (Universal Infrared Receiver+Transmitter)
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0         8
  idVendor           0x0403 Future Technology Devices International, Ltd
  idProduct          0xf850 USB-UIRT (Universal Infrared Receiver+Transmitter)
  bcdDevice            6.00
  iManufacturer           1 FTDI
  iProduct                2 USB-UIRT
  iSerial                 0 
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           32
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0xa0
      (Bus Powered)
      Remote Wakeup
    MaxPower              100mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass    255 Vendor Specific Subclass
      bInterfaceProtocol    255 Vendor Specific Protocol
      iInterface              2 USB-UIRT
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x02  EP 2 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               0
Device Status:     0x0000
  (Bus Powered)


The best thing I've come up with is that there is something wrong with the kernel driver that is preventing this from working. But all the posts that lead me to believe that are very old and I'm not sure how to verify the problem. 

Any help would be appreciated. Thanks!
Ben