Hi Pete, I am probably going to have to get back on a couple of items, but this might help you.
I am using FSX; when starting engines using switches 1 and 2 only, they spool up engines, but upon reaching 20% N1, they die on me, and the process is repeated and repeated until I stop it by putting switch in the down position and back to center.
I am using the latest PFC.Dll dated 22/01/09, I am pretty sure this must be version 4.34
I am using FSUIPC Version 4.421
I used to run FS9, and had no problems (with appropriate drivers)
With regard to my A/T button, I do need to check I have it properly enabled in my PFC Main screen. It does however work 100% of the time using the FSUIPC interface, and 0% using PFC Drivers only. I should mention however that it does not come back to the 'on' position reflecting the actual switch position, so in the event of a go-around, I have to mannually flick it off and on again.
I am not sure how to attach an PFC INI file to a post like this, can you tell me how, or an e-mail address I can send to (I know how to do that!)
Just one other point which might help. Prior to my re-install of Vista, etc etc, I was getting a problem sometimes with switch number 4 when shutting down engines. Sometimes it would work, sometimes not. It did however always work after a few 'goes' at it.