TCP/IP Communication - 2 applications meant for separate clients - not working on single computer

Hi,
I have developed 2 applications (will ultimately operate on two different machines, but for development I want to run them on the same computer) that work in a similar manner to the TCP Communicator examples in LabVIEW 8.20.  What I can't understand is why the examples do not catch their own send commands.
Each of my applications has a send and recieve while loop - one app. listens for a connection and the other creates the connection.  That is working fine, but when I send information (which is intended to go from one application to the other) - it will get often "get caught" by the recieve loop that is operating with the same TCP/IP connection.  This makes sense because both loops are looking at the same port, but there should be a way around this because it does not occur in the examples provided by NI.
Any help is greatly appreciated! 
Thank you,
Travis

I'm surprised you can get that far.
I currently have 4 loops on two computers.
Loop1 (on PC #1) uses port 2702 to talk to Loop2 (on PC#2)
Loop3 (on PC #1) uses port 2701 to recieved data from Loop4( on PC#2)
I'm using TCP Listen.vi, TCP Open Connection, and TCP Read/Write.
I intended for this to allow simultainous communication betwen the PCs using two different ports (I know TCP IP supports this, I can surf the web and download something via ftp at the same time) but LabVIEW says "The specified network address is currently in use." When I run the VI on PC1.
I agree the address might be in use but not that port number (I know they are wired correctly to 2701 one way and 2702 the other way).
Any suggestions?

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