f-prot update error

[Mozzi]

Hallo all
I got the following error

***************************************
* F-Prot signature file update script *
***************************************

There's a new version of:
"Application/Script viruses and Trojans" signatures on the web.
Starting to download...
Download completed.
Fatal error, error while unzipping file. Please
check the file permissions and try again.

Fatal error: exiting...

I ran this cript as root so I don't understand how my file permissions can be
an issue
Can someone shed lite on this for me please


Mozzi