Dev Kit for 4010 hangs after first compile

I am experiencing a problem with my 4010 development kit. It seems like I can compile and run a program once, then if i modify it or try to run another one the connection fails. I get a negotiating baud rate message, then a connection timeout message.

My serial port settings and connectors must be correct since i do get a successfull first run but after that, it seems to hang.

Any ideas what could be causing this?