Hello, I just installed the PMDG 737 on my computer and i have the following problem. If i choose to fly without using the FMC, the autothrottle is not engaging and i fly the plane with auto pilot but the speed is controlled manually by me. The autothrottle button does not move to the "on" position. Any ideas why?

>Hello, I just installed the PMDG 737 on my computer and i>have the following problem. If i choose to fly without using>the FMC, the autothrottle is not engaging and i fly the plane>with auto pilot but the speed is controlled manually by me. >The autothrottle button does not move to the "on" position. >Any ideas why?First - read the forum rules and remember to sign your nameSecond - use the search function of the forum and try the word autothrottle and you'll find lots of posts on this topic, which would lead you to the solution - make sure your engine driven generators are turned on on the overhead panel.