Found the problem by looking at the windows event viewer:
MsiInstaller ID 11335
Product: Windows PE x86 x64 -- Error 1335. The cabinet file '9722214af0ab8aa9dffb6cfdafd937b7.cab' required for this installation is corrupt and cannot be used. This could indicate a network error, an error reading from the CD-ROM, or a problem with this package
I searched for the file in question, deleted it, restarted creation of rescue disk.
How can i contact the support guys back to tell them problem is solved?
Thanks,
Simone