First of all, thanks to Emu_kidid for the Viper GC Extreme, I received the Viper and Xeno in brand new condition! Thanks!
And now, I successfully flashed Cobra 2.1 on my Viper, but when I try to load any kind of other program, it gives the error:
Cobra BIOS is not responding correctly, try again
And after that 2 possible reason why it won't respond.
I have all DIP switches on OFF, and I'm in the main menu.
Please DON'T tell me I've got a faulty Viper. BECAUSE I HAVEN'T.

Is it a normal problem?
I'm using my old Windows XP laptop for this.