#12 Can't "Add New Podcast"

[Tim]

After installing the podcaster module and adding a
channel successfully, I tried to "Add New Podcast" and
the browser window went blank. I thought I set the
permissions for the directories accurately.

Here are the permissions I currently have:

parent directory...
drwxr-xr-x 10 root shared 4096 Jul 28 2005
podcaster

subdirectories...
drwxr-xr-x 2 501 shared 4096 Jul 28 2005
boost
drwxr-xr-x 2 501 shared 4096 Jul 28 2005
class
drwxr-xr-x 2 501 shared 4096 Jul 28 2005
conf
drwxr-xr-x 2 501 shared 4096 Jul 28 2005
docs
drwxr-xr-x 2 501 shared 4096 Jul 28 2005 img
drwxr-xr-x 2 501 shared 4096 Jul 28 2005 inc
-rwxr-xr-x 1 501 shared 1410 Jul 18 2005
index.php
drwxr-xr-x 2 501 shared 4096 Jul 28 2005
lang
-rwxr-xr-x 1 501 shared 4204 Jul 28 2005
README
drwxr-xr-x 5 501 shared 4096 Jul 28 2005
templates

What should I try next?