problem with pmdg 737 and printscreen

Hello all,When I fly the pmdg and want to take a screenshot, I press printcreen"imprim ecran" keyboard button . Pressing that key also disconnect autopilot on MCP (I have try tu use CMD A and CMD B but in both case I had to repress on CMD A or CMD B after taking screesnhot)I have only change pushback button in pmdg fs2004 menu so I don't see what could be the source of my problem. I also look for CMD A and CMD B keyboard button in pmdg menu but they are attributed to a keyboard button. In fact, I see that it's all key button between letters and numbers (so insert, suppr, end, first line, .... and all the others had the same effect disconnect AP) I also look in another fs2004 aircraft to see if printscreen act like "Z" but no problem with others aircraftsThanks for your help