superman

Dear Avsim support Im have some problems getting the apu running on cold and dark in my Pmdg 737ngx when I selected cold and dark in the FMC everything completely shuts down I ran through the checklist carefully I started the battery switch first then the standby switch on auto I have electrical power but when I start the Apu switch it doesnt start it gets stuck on 0 and it wont run at all but when I selected Short or long ngx on my FMC I have full electrical power and the Apu is running fully all the way until the Apu GEN turns blue but once it turns Blue I flip the switch nothing happens at all i kept click on the Apu Gens and Its still blue and my Apu wont Bleed also when I turn on my engs it runs but my Engs wont spool up fully when I idle the engs it get stuck it wont spool at all it says Eng fails when i idle it i try everything to get it going but it seems its not working right and im kind getting fustruated that my apu wont start on cold and dark and my Engs are not Spooling during start up what do i do to fix this?