Error when trying to Delete Page in CS5

Whith an administrator role on my connection, I get the following error when trying to delete a page:

There is not enough disk space on the server to perform this action. Please contact your administrator for assistance.

This happens after I switched from CS4 to CS5. It worked perfectly well with CS4. Now with CS5 on both the Windows and Mac I get this error. Is this a known issue? Is anyone aware of a fix?

Thanks in advance for your help.