what I have read suggest its not finding the address/port its suppose to be looking for.
10048 address already in use. User suggestions: Don't try running two of the same types of server applications on the same machine. For instance, this error will occur if you try to run two applications that have FTP servers. In this case, the 2nd application will fail with WSAEADDRINUSE
RESOLUTION
The only workaround is to not use a specific local port. If you set the LocalPort property to Zero, Winsock will pick a random local port for you and use it until a Close method is called on the WinSock Control.
PRB: Winsock Control Generates Error 10048 - Address in Use (Q173619)
http://support.microsoft.com/default.aspx?scid=kb;EN-US;q173619
What are you doing at the time this occurs?