Intermittent connection

Hi,

On only one pc I have problems with my MSN connection. It turns out, that I
only have problems with my MSN connection because:
-I've had the issue with both Windows XP and Windows 7
-I've had the issue with all versions of MSN
-I've had the issue with several internet connections (through mobile phone,
through cable connection, through wireless)

The problem is, that every now and then MSN logs out and tries to login
again. I cannot pinpoint what is causing this! I have enabled the logging,
but to me it is unclear what that all means.

Is there somebody who understands these log files or understands what may be
happening?

Thanks in advance!