Hi to everyone !!!!

do anyone knows why my nokia 7110 restart after accessing my inbox from a fbus command? Do it have any Fbus command again to issue every request send? I also send some aknowledge form every request i make but still it restart and give me a unknown ouput like : 1e ff 00 00 00 00 .....

what does it mean??? I use VB in sending FBus request...