autothrottrle will not engage

[Guest Gerrit Suichies]

I had to reinstall FS( for other reasons), I had to setup PMDG 737 NG again, but unfortunatly the autothrottle will not arm. After a while the speed drops and the plane stalls.Has this problem occured by other users?Can this be fixed? Please some helpGerrit Suichies

[Guest gsisteve]

iv had it for some reason when iv been setting up for takeoff iv come to arm autothrottle to engage TOGA but it wont arm and iv had to reload the plane again?