Thank you for your post.
Is the one machine in a different subnet? Try having the person log in from a computer that isn't having a problem. Does the problem still exist?
Any additional information you can provide may help narrow down the possibilities.
Thanks so much for your time and expertise.
The problem computer is at a 2 computer office so same subnet. There are no problems with the other computer. There are no problems with her account name and password on the other computer. I can also log in at my remote location using her account as well.
I'm very capable of troubleshooting Mac environments, but not so much windows systems and I am not her IT person. I'm thinking that next time I'm there I will try setting up a different user account on her system and see if that has any problems logging in.
I'm also usually good at finding commonalities when trouble shooting and so far I have had no luck with that.
As you probably know, the intermittent problems are always the most difficult to troubleshoot.
Since you are accessing Filemaker Server, and the user has no problem logging in from another machine, my initial thought would be to replace the server.pem file on that machine. That is, take the server.pem file from a working machine, and copy it onto the intermittent machine. On Windows, you will find the file in the directory where the application is located. For example, on Windows XP, this may be:
C:\Programs Files\FileMaker\FileMaker Pro 10\server.pem
Relaunch FileMaker Pro 10, Open Remote, and try again.
If this doesn't work, have you uninstalled and reinstalled FileMaker Pro 10?
Please keep me updated with any progress.