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dial up networking problem

I have a new portable on which the modem and dial up networking worked fine two weeks ago when I issued it to the user. In the mean time something has happened to the dail up networking. The old setup kept telling me that the modem was not installed or not installed properly, however the modem shows up in the system file and under modems it shows and when I run the diaganoistics it works fine.
I then tried to install an new dail up session and now it keeps coming up with the what type of modem do you want to install modem. Again the modem is installed and is viewable in both the modem window and system window.
Machine is runnig windows '98 second edition. It is a Micron Transport Nx just 4 weeks old and Micron tech support also seems to be at a lose.
I do get a illegal operation from the file Tapisrv other than that everthing works fine. I have also removed all networking files and reinstalled them.
The connection is for a simple ras into my server and nothing else.
Any ideas?
1 Solution
I recommend that you first delete the modem and then the dial up network from within the control panel.  After you do this then try to recreate the dialup networking app and then reinstall the modem.  I had this simmilar issue with a number of user and that was all i had to do to resolve the issue.
JohnBurkertAuthor Commented:
been there done that It didn't work
I just ran into this same problem.  Found that a corrupted Unimdm.tsp file was the cause.  The fix is outlined in Q150619 on the Microsoft support site.  Extract the Unimdm.tsp from the CAB file to windows\system.

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