Yahoo IM being attacked ?

Greeting's

I was going through my firewall log's and what I have noticed is lot of request's with following details :


Application : Yahoo mess. (ypager.exe)

Protocol : TCP/ACK

Local port : " 1433 ". (which is default for ms_sql)


Now I am not really surprised at finding port 1433 being scanned but what is troubling is that the application is yahoo messenger.

There is one more thing that is interesting is that all have come from same ISP but only one has come from an static address.

I just want to know is some one else is facing the same problem ?