Hi,
Just checking Markus, did you try an older version eg even as far back as the 5.0 base image? also check against the HCL guide
http://www.vmware.com/resources/compatibility/search.php?rct=j&q=&esrc=s&frm=1&source=web&cd=1&sqi=2&ved=0CEoQFjAA&url=http://www.vmware.com/go/hcl&ei=MXneUbeVG-PX0QXImYCwBQ&usg=AFQjCNEXuH3H1BNILfm7AMoBNO0jQXhT-g&sig2=x5niG-AljlFU47NHRC_EDw&bvm=bv.48705608,d.d2k to ensure your h/w is completely covered.
Many tx