A transport-level error has occurred when sending the request to the server. (provider: TC

when i enter the user name, Password and click enter in my site

it showing below error..

A transport-level error has occurred when sending the request to the server.

(provider: TCP Provider, error: 0 - An existing connection was forcibly closed by the remote host.)

What may be the problem..

This does not sound like a SQL Server problem, it's more likely something is acting up in the network.

Have a look at 2 links below if it still fail after few retries:
http://www.mcse.ms/message2316445.html
http://channel9.msdn.com/ShowPost.aspx?PostID=243278

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i am accessing the site through internet..

if i reload the error page it loading successfully..

sql