Outlook 98 cannot receive

A co-worker turned on her computer this morning; Outlook loaded but no new emails were displayed.  She clicked on Send and Receive and received the following error message:

File In Use

The message had a title bar that said Microsoft Mail.  She rebooted: no difference.  She turned the computer off completely, unplugged it, and then turned it back on: no difference.  She can send, she can access the existing emails in her Inbox, she just can't receive.  It was working fine the night before when she turned it off.  We tried running Inbox Repair on it, but that didn't make a difference.  

Does anyone have any ideas what File is in Use?
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VinceAConnect With a Mentor Commented:
It's a long shot but try rebooting the machine that contains the MS Mail postoffice.
jangle57Author Commented:
You were right!  That fixed the problem.  We hadn't really considered doing that since no one else was having a problem, but right after the mailserver finished rebooting, my co-worker suddenly got 44 new emails delivered to her that had been sitting out in cyberspace and its been fine ever since.  Thanks!
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