Brake problem in Microsoft Flight Simulator - FSX

I have reinstalled all SW (FSX, UTX, Saitek, etc.) and cannot come back tp my old flying configuration that worked so well. 

If I use "left or right toe" on the pedals, the differential brakes engages, e.g. are blocked. The only way of getting out of this is to engage the parking brake, and thereafter push the brake button on the yoke (buttom no 1 in my case). If I press both "toes", one after the other, the brakes engages and can not be disengaged without going via the parking brakes.

The assigned button on the yoke (no 1) does not work as allocated, as "brake", and hence cannot disengage the brakes either. Furthermore when starting a "free flight" the differential brakes are indicating, why?

The question whether there is a checked position somewhere that provides conflict or there might be software conflicts with the pedals?

Thanks for some guidance.

/ / Svante