CAVS & Exchange

After installing and using CAVS for a little while, I noticed that it was not scanning my email. After running several of my own test this is what I found. CAVS has no problems with POP3 accounts in Outlook Express . Using Outlook 2003 CAVS scanned the email but did not leave a signature behind. And when using Outlook 2003 with an exchange account, CAVS did absolutely nothing. If anyone has any idea why this may be, please help me fix it. Thanks.