"Error loading the TCP MIB library"
If thats the error message u are getting (see above) . . . . .
If you havent already, check here . . .
http://support.microsoft.com/default.aspx?scid=kb;en-us;Q261302
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I've not encountered the problem - but it appears it happens after installing third party soft.
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Print\Monitors\Standard TCP/IP Port\Ports
The above key (in registry) creates the the port when the spooler service is started (during boot, i would guess)
You can try exporting the key to a .reg file, then edit with notepad, rename the port and the ip address assigned, re-import it back into windows, and restart the computer (or just the spooler service)
I've not had this problem before and cant say if it will work for you. But backup the registry or the key you are going to edit - incase something goes wrong.