Socket Timeout?

How to make greater the timeout value of a socket?
My socks give me error after only few milliseconds......... Too little for internet, isn't it?

Thanks,
Xmas79

Socket.SocketOption

VB Code:

'Send operations will timeout of confirmation is not received within 1000 milliseconds.
s.SetSocketOption(SocketOptionLevel.Tcp, SocketOptionName.SendTimeout, 1000)

Yes, I found it in the MSDN, but it says me "unknown level or option"...

What's wrong?
Thx