I'm trying to load BCM5788 packet driver for my thin client (HP t5570) but I'm facing a strange problem.

I loaded LSL.COM using the NET.CFG provided.
B57.COM is detecting my BCM5788 chip but in the end of the B57.COM execution, I'm getting this 3 chars (=˥ ʄ).
After this the program shows me a message:

B57-DOS-6: The adapter did not initialize. B57 did not load.