I tried everything that has been shown to me in those two links you gave me, NTDOC, but nothing helped. I just can't access Windows XP-Computers from the Win2k-Workstation. I tried everything, set up all the WMI stuff but it just does not work... the error is
"COM exception error "ConnectServer" (SWbemLocator - Der RPC-Server ist nicht verfügbar.)"
(means "RPC-Server is not available")
i don't have any more ideas...