Peter - 2012-03-21

I would like to check my bacnet device by VTS but I have got problem with communication between VTS program and my Bacnet device. For communication I using PTP port, but it is a problem to send whatever to my device, because every time when I click "send" button then program is going closed what is wrong?

When I send data from my device to VTS there is ok, because I can see this data in the window BACnet PTP Layer

Anyone have idea  what I doing wrong?