OE6 has stopped working

Running Win 98 (first edition). All of a sudden, Outlook Express 6 has stopped working. It opens, but that's it. The cursor stays as an hourglass forever. Says at the bottom "Working Online." After a while, Ctrl-Alt-Del shows it's not responding so I have to close it. Internet access and everything else on the computer works fine. I haven't installed or uninstalled anything recently except a Zone Alarm update. I am able to check my mail through Yahoo and I am receiving messages so I don't think it's an ISP problem. Any ideas? I have run the IE repair function, with no effect.

 

http://insideoe.tomsterdam.com/problems/performance.htm

 

Thanks for the link. I'll check it out. I've also found through some forum surfing that the newest upgrade to Zone Alarm is causing this sort of problem for some people so I'm going to work that angle too.