A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond error is coming while load testing in Visual studio 2010

Question

While Running load test this error occurs"A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.

Error Stack Trace:

 at System.Net.Sockets.Socket.EndConnect(IAsyncResult asyncResult)
 at System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure, Socket s4, Socket s6, Socket& socket, IPAddress& address, ConnectSocketState state, IAsyncResult asyncResult, Int32 timeout, Exception& exception)

Can anyone help me to solve this Issue?