Hi,
Check what is the B {XX} value in mg_cfg file
Possible options B: { ХХ } from 00 to 12
# box type
# 00 autodetect, change only if you think wrong type detected.
# 01 dbox2
# 02 dreambox E1
# 03 triple-dragon
# 04 relook
# 05 openbox
# 06 dreambox/mips E2
# 08 stapi/kathrein
# 09 stapi/ipbox
# 11 stapi/openbox
# 12 stapi/openbox Sxx & others
Experiment with these values, maybe it will help you. Otherwise, you need to visit support forum of your receiver and ask there, how to set up your box properly.
Regards