Norton Safety Minder causes browsr to freeze

Hi, I have 2 computers with Norton Safety Minder installed. On one computer there is no problem. On the other, if Norton Safety Minder is enabled, the browser freezes. Happens on Firefox and IE. Win XP Pro SP3 No other security product installed. I re-installed safety minder and it worked for 5 minutes. After logging off the windows account I was using, I logged back in, and the browser was freezing when Safety Minder is enabled.