This is a windows server 2003 guest (the host is also winodws server 2003) using vmware 1.0.6.
From time to time the guest looses it's ethernet adapter permamently. When I ping from inside the guest I receive "hardware error". I can deactivate and then activate again the ethernet adapter in the windows device manager and that repairs it.
Also when I restart the vm it works again.
But after approx. 1 or 2 weeks the same thing happens again.
edit 1: I do not have VMWare tools installed in the client. Should I?
edit 2: I accepted the answer about upgrading, and tried it out
edit 3: The upgrade if VMWare server did not help. If anyone has still different approaches which is more specific aboute the symptoms I could also change the accepted answer later.