Ms outlook 2007

I have a user who’s ms outlook 2007 calendar notification(pop-ups) not working.I tried to uninstall and reinstall office…I also tried to Exit Outlook, click Start, point to Run, type outlook /cleanreminders, and then click OK.
Exit Outlook, click Start, point to Run, type outlook /resetfolders, and click OK. Use this method if the /cleanreminders.

Nothing works….Please help.