outlook 2k sp3

i have some users that when they try to forword an e-mail nothing happens they hit the send button and it just sits there, they can copy the text into a new massange and send it out just fine. i have changed it from using MSWord but that didn’t help i have also uninstalled and reinstalled office re loaded all the updates. one of them is windows 98 se and the other is windows 2k. can’t seem to find anthing on MS KB. Thanks for the help…