I have recently installed Zimbra Open Source Edition (Red Hat Enterprise Linux 5 x86) on my CentOS 5 machine, the installation process was completed without errors, but I have encountered the following problem:

- when I access "Briefcase" (from any account) I am able to create new folders, but I cannot upload any file; the "Upload New File to Briefcase" window appears, I choose my file, click OK, but nothing is uploaded and no error is returned;

- I have also tried to save an attachement from an email using the "add to briefcase option", again, the dialog appears, I choose the destination folder, click OK, but here the following error message appears:

A network service error has occurred. msg: system failure: cannot create ParsedDocument
code: service.FAILURE
method: ZmCsfeCommand.prototype.invoke
detail: soap:Receiver

Any ideas? Thank you!