NanoBTS Problems

Hello, I'm working with OpenBSC since 2 month. Currently my OpenBSC setup runs with 2 mobile phones which can communicate A5/1 encrypted with each other. I got several problems while running this system with a NanoBTS. I use osmo-nitb. Entries in my HLR receive wrong time values. The time values of the column "created" and "updated" are exactly 2 hours earlier than they should be. The system time of the controller works fine and the time in the logs from "./osmo-nitb -e 1 -T" is correct. Are there any other timers which work with the NanoBTS? Furthermore my network does not run stable. Sometimes following error occurs : input/ipaccess.c:454 Bad signalling Message, sign link returned error input/ipaccess.c:260 Forcing socket shutdown with no signal link set The error usually appears after some authentification "traffic". Sometimes the system runs stable for several hours without any errors. The error leads to a restart of the connection. I'm not sure if this problem has something to do with the first problem. thanks and best regards! Nicklas