Hello everyone... i have a question about the autopilot, and hope someone that really understand about the real plane procedure answers me :D

About the autopilot... i never had any problem with it.. even before the update... Fact is that if you do load the plane in cold and dark mode, and if you perform all the maneuvers in it's correct order (IRS alignment e.t.c.. and if you use your mouse to handle the autopilot (unfortunately it seems we cannot key path this) everything will work 100%

My question is... it seems that when i do everything correctly as mentioned above, except filling the FMC with some Flight plan, the autopilot doesn´t works at all?    is this real? a real 757 will need it's FMC programmed in order to make the autopilot functional?

Thanks in advance!