Can't upload files using php file upload: Debian Sarge

[tsmaudio]

Hi guys
I have a strange problem that I hope someone might be able to help with.
My new server is running Debian Sarge and IspConfig, set up using falkos perfect set up guide. For some reason I can't upload files to the server using a PHP upload form/script.

I have been working with the same form/script on a different server which is configured with fedora core 5, using again falkos perfect set up, (thanks falko) and it works fine.

The reason I have switched to Debian is because that is what the hosting company provide. I have made sure everything is at least set the same in the php.ini and apache2.conf files and made sure PHP safe mode is turned off.

Is there something else I can check or do?

Cheers
Tony