Just an update, as i tried to email you, and your email address is dead, so the emails bounced back.
I have downloaded your entire site, all 200+mb of it, and uploaded it onto my server, to test if it is your hosting or my feed at fault.
Apart from the images, i have uploaded all other files including the database
http://host.newworldhosting.co.uk/~kazooit/
And then run the feed on my server with no changes at all the database, or settings. all i did was publish the Froogle feed mambot, and refresh the home page.
These XML files were generated
http://host.newworldhosting.co.uk/~kazooit/mambots/system/vmrss_v4/
Both All Products and Latest Products have been produced fine.
So the fault is somewhere with your hosting not the feed. You need to talk to your hosting company about this and see if they can help you as something is preventing the feed working or being generated.
My hosting is just standard Linux VPS environments, nothing special at all. I have it set as standard as possible, so when i develop anything, i know it should work anywhere else.
As i left your username and password in the Mambot for Google Base, you should see the feed uploaded to your Google account, which will probably fail, as their are so many products, i would imagine without looking, a few have special characters or errors that Google will fail.
All the best
Ian