"invalid TCP Stream" Error on Remote Computer

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If you have read the previous two posts on this forum, you have a pretty good idea of what i am trying to do. However, whenever i try to us my TCP commands in an executable to communicate with my computer, the remote(not mine) computer always gets the error "Invalid Stream" or something to that effect. Could this be due to the firewall that came with my recent DSL? Am i just not setting up the server right in the local code? Does my computer just know which programs i made and make them not work? I'm placing the source below. Please help me out.