I have a Freelan Roper 802.11g Wireless PCI card model RO80211GTI-PCI.
My pc is AMD 64 3000 MHz and 512 MB di RAM.

I have followed this guide https://help.ubuntu.com/community/WifiDocs/Driver/acx111.

I have any errors when I compile the kernel module. I obtain this answare:

make: Entering directory `/usr/src/linux-headers-2.6.28-11-generic'
  LD      /home/antonio/ACX/acx-20080210/built-in.o
  CC [M]  /home/antonio/ACX/acx-20080210/wlan.o
  CC [M]  /home/antonio/ACX/acx-20080210/conv.o
/home/antonio/ACX/acx-20080210/conv.c: In function ‘acx_rxbuf_to_ether’:
/home/antonio/ACX/acx-20080210/conv.c:502: warning: cast from pointer to integer of different size
  CC [M]  /home/antonio/ACX/acx-20080210/ioctl.o
/home/antonio/ACX/acx-20080210/ioctl.c: In function ‘acx_s_scan_add_station’:
/home/antonio/ACX/acx-20080210/ioctl.c:506: warning: passing argument 1 of ‘iwe_stream_add_event’ from incompatible pointer type
/home/antonio/ACX/acx-20080210/ioctl.c:506: warning: passing argument 3 of ‘iwe_stream_add_event’ from incompatible pointer type
/home/antonio/ACX/acx-20080210/ioctl.c:506: warning: passing argument 4 of ‘iwe_stream_add_event’ makes pointer from integer without a cast
/home/antonio/ACX/acx-20080210/ioctl.c:506: error: too few arguments to function ‘iwe_stream_add_event’
/home/antonio/ACX/acx-20080210/ioctl.c:513: warning: passing argument 1 of ‘iwe_stream_add_point’ from incompatible pointer type
/home/antonio/ACX/acx-20080210/ioctl.c:513: warning: passing argument 3 of ‘iwe_stream_add_point’ from incompatible pointer type
/home/antonio/ACX/acx-20080210/ioctl.c:513: warning: passing argument 4 of ‘iwe_stream_add_point’ from incompatible pointer type
/home/antonio/ACX/acx-20080210/ioctl.c:513: error: too few arguments to function ‘iwe_stream_add_point’
/home/antonio/ACX/acx-20080210/ioctl.c:523: warning: passing argument 1 of ‘iwe_stream_add_event’ from incompatible pointer type
/home/antonio/ACX/acx-20080210/ioctl.c:523: warning: passing argument 3 of ‘iwe_stream_add_event’ from incompatible pointer type
/home/antonio/ACX/acx-20080210/ioctl.c:523: warning: passing argument 4 of ‘iwe_stream_add_event’ makes pointer from integer without a cast
/home/antonio/ACX/acx-20080210/ioctl.c:523: error: too few arguments to function ‘iwe_stream_add_event’
/home/antonio/ACX/acx-20080210/ioctl.c:531: warning: passing argument 1 of ‘iwe_stream_add_event’ from incompatible pointer type
/home/antonio/ACX/acx-20080210/ioctl.c:531: warning: passing argument 3 of ‘iwe_stream_add_event’ from incompatible pointer type
/home/antonio/ACX/acx-20080210/ioctl.c:531: warning: passing argument 4 of ‘iwe_stream_add_event’ makes pointer from integer without a cast
/home/antonio/ACX/acx-20080210/ioctl.c:531: error: too few arguments to function ‘iwe_stream_add_event’
/home/antonio/ACX/acx-20080210/ioctl.c:549: warning: passing argument 1 of ‘iwe_stream_add_event’ from incompatible pointer type
/home/antonio/ACX/acx-20080210/ioctl.c:549: warning: passing argument 3 of ‘iwe_stream_add_event’ from incompatible pointer type
/home/antonio/ACX/acx-20080210/ioctl.c:549: warning: passing argument 4 of ‘iwe_stream_add_event’ makes pointer from integer without a cast
/home/antonio/ACX/acx-20080210/ioctl.c:549: error: too few arguments to function ‘iwe_stream_add_event’
/home/antonio/ACX/acx-20080210/ioctl.c:559: warning: passing argument 1 of ‘iwe_stream_add_point’ from incompatible pointer type
/home/antonio/ACX/acx-20080210/ioctl.c:559: warning: passing argument 3 of ‘iwe_stream_add_point’ from incompatible pointer type
/home/antonio/ACX/acx-20080210/ioctl.c:559: warning: passing argument 4 of ‘iwe_stream_add_point’ from incompatible pointer type
/home/antonio/ACX/acx-20080210/ioctl.c:559: error: too few arguments to function ‘iwe_stream_add_point’
/home/antonio/ACX/acx-20080210/ioctl.c:574: warning: passing argument 1 of ‘iwe_stream_add_value’ from incompatible pointer type
/home/antonio/ACX/acx-20080210/ioctl.c:574: warning: passing argument 4 of ‘iwe_stream_add_value’ from incompatible pointer type
/home/antonio/ACX/acx-20080210/ioctl.c:574: warning: passing argument 5 of ‘iwe_stream_add_value’ makes pointer from integer without a cast
/home/antonio/ACX/acx-20080210/ioctl.c:574: error: too few arguments to function ‘iwe_stream_add_value’
make[1]: *** [/home/antonio/ACX/acx-20080210/ioctl.o] Error 1
make: *** [_module_/home/antonio/ACX/acx-20080210] Error 2
make: Leaving directory `/usr/src/linux-headers-2.6.28-11-generic'

what's the problem?

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Sorry for my english.