The underlying connection was closed

Environment:
c#, Framwork 2.0, Win2003 server, IIS 6.0, Copy deployment (uncompiled
source code deployed to server)

I have written a web service that calls another web service. The ws I am
calling is third party, but written in .net (unknown framework version). I
am calling the 3rd party ws over https.
When my ws is called without ssl everything works great. However, when my
client is calling my ws using https, I get the following error:

The underlying connection was closed: An unexpected error occurred on a
receive.
System.Net.WebResponse GetWebResponse(System.Net.WebRequest)
....

I won't post the entire stack trace for size reasons.
The error will only pop up after a number of days of everything working just
fine. No changes on the server or the source code.

I have seen a number of 'solutions' to this problem, but they all apply to
1.0 and 1.1 frameworks. Does anyone know why this is happening and what I
can do about it in 2.0?

Thanks

Kirk


.

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