TBS6921 BS Tool problem with switching LNBs

I use TBS6921 BS Tool ver. 3.0.0.1 with Inverto Twin Monoblock LNB (set for Hotbird 13E and Astra 19.2E) and TBS 6921 driver ver. 2.0.0.5. When I wanted to do a blindscan for Hotbird, everything was OK - I set Diseqc A and the program searched for transponders. Switching for another satellite does not work, regardless of the selected Diseqc (B, C or D). The program doesn't switch between LNBs and scanned is Hotbird only, not the Astra. Is it possible to fix this issue in the next version of BS Tool?