File transfer fails


I have a problem transfering files. I can send to a contact but not vice versa. Wildfire 3.1.1, Spark 2.0.7 (fresh install), server running 2003, clients running XP SP2 not firewalled, clients on same subnet.

Raw sent packages, in the failing part it seems like a stream is never received(?):

me->other OK

Those are all the packets that are send in the second transaction? Any errors in your log files?