A transport-level error has occurred when sending the request to the server. (provider:tcpprovider, error:0-existing connection was forcibly closed by

ERROR MESSAGES:
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A transport-level error has occurred when sending the request to the server. (provider:tcpprovider, error:0-existing connection was forcibly closed by remote host)

Resolution:
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Most of the times issue is Figured out to be a network device issue

using windows server 2003 and Broadcom network card

apply this KB

http://support.microsoft.com/default.aspx?scid=kb;EN-US;942861