Sorry about the delay, I have a real job keeping me busy lately.
I played with this a bit and was able to reproduce something similar using the NI shipping examples.
I was able to correct it by;
1) Make sure you wire a timeout value! The default is about 10 minutes so you will have to wait that long to all evidence of the conncetion go away.
2) The client should close the conncetion b4 the host. This will leave a session hanging for 10 minutes as well.
Now that you have the ability to post as LV 6, I suggest you start a new question to get a wider audience. I am going to be very scarse in these parts over the next month or two.
Ben