Hallo.. I would appreciate any help to solve this very tricky problem: In my company we are using NOD32 as anti virus on almost every pc. We mainly develop software for VoIP services and since the day we install NOD32 some of them are missing to receive tcp packets. Since we've checked it whit ethereal we are sure these packets arrive to the machine, but our software is not able to process them. Quitting the IMON functionality everything works fine again, but its disable does not help.. We devolop whit VS6 and VS .NET Any Idea? Thank you.