error server execution failed

Visual studio help -need help with email form?
I have sent up my stmp settings for an email form that I have created for a client. I test run the form on my local machine a ok but when I try to submit the form when it is on the remote server I get this error
Server Error in '/' Application.
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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
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Net.Sockets.SocketException: 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
Source Error:
Line 12:
Line 13:
Have you setup a mail server at the client's side?
You may have configured it for "localhost" on your development machine and there's no email server on your remote server.
It's also possible that the firewall or network setup at the remote server blocks mail connections.
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Main Script Execution Failed " Weget Error"