Why when I'm sending SABM like this

0x02 0x28 0x20 0x08 0x00 0x04 0x00 0x45 0x00 0x03 0x3F 0x01 0x1C

I only get number of packets sent and nothing else but I should get UA.

After a while I get disconnect request and that's all.

What am I doing wrong??

Regards

Maciej