Backup Problem

[phpman]

Hello All,

i have a problem, if i make backup of the GSCMS from backend and i download the ZIP file (e.g. Firefox / IE etc.)
and i would like to open the local stored file on my PC i get allways the messags "folder can not open - the ZIP file are unknown" if i use Windows ZIP or 7Zip etc. the same.

Anyone has the same problems ? I do not make modifikations on server side.

Server-Einrichtung

PHP Version
5.3.3-7+squeeze29 - OK
cURL Module
installiert - OK
GD Library
installiert - OK
ZipArchive
installiert - OK
SimpleXML Module
installiert - OK
chmod
chmod - OK
Apache Web Server
Apache/2.2.16 (Debian) - OK
Apache Mod Rewrite
installiert - OK

Hope you can help

Thanks

best regards,

Harald