I don't usually go online to seek computer help, but I can't figure this one out.

I use Outlook Express to manage my email accounts and have never had a problem. All of the sudden when I send an email it goes to my outbox and just stays there, sending itself over and over. I didn't notice the problem until a client called me, telling me he had gotten my email over 50 times. I do get the yellow triangle with the exclamation point, reporting an error, but there is nothing in the details box, it's empty. I thought I had the problem knocked when I re-started my computer because I tried sending an email to an address I used earlier that was getting the repeats and it worked fine. Then I sent to a different address and it happened again. I have no clue where to begin fixing this so if anybody has a suggestion it would be greatly appreciated.

Thanks in advance!

im not sure but it could be a worm (they make copies of themselves and use emails in your address book to send them) an antivirus program can take care of this like norton antivirus 2004, if you dont have one there are plenty of free utillitys you can download on the internet.