[newbie] MandrakeUpdate

[Smiley]

Hi, all!
When I try to retrieve packages from wahtever source through
MandrakeUpdate, Software Installer give me this error message: "Bad,
unreadable or not found packages" - "Sorry but all packages raised an
error. so I can't proceed with the installation"
This happens since yesterday, before all worked fine...
Any hint?

Corrado