SMTP Scanning with Outlook 12

I have just updated my copy of MS Office Professional 2003 to version 2007 BETA (from MSDN website) and now i need to turn OFF all Inbound and Outbound SMTP & Outlook Scanning or the mail never passes through the scanner. >:(

Any thoughts ?

Make sure the avast plugin is not disabled into MS Outlook:
Outlook 2003 > Help > About > Disabled items

Do you happen to be using the MSN toolbar or desktop search ?