We have an internally created add-in for Outlook 2003 that uses a timer. For most people this is working fine. A few users are using a third party add-in in addition to our internal one. I have debugged our code and found that for thes users our internal add-in freezes outlook right after the Timer is enabled. Given that I have no control over the other add-in, is there there anything I can do or change in our code to fix this? Any ideas what the problem could be?