In your last flight PF3 was waiting for you to click OK on the message that PF3 pauses every 15 minutes
In the flight before that it looked like you closed FS before closing PF3... other than that there didn't appear to be any problem other than you weren't using the correct hotkey(s) when tuned to Ground control. You continually hit Hotkey #1, which is to toggle TGS on/off once you receive taxi instructions. You hit Hotkey #2 a few times and received the message that ACARS ATIS was not available at that time. You also hit Hotkey #3, which is non-active when tuned to Ground.
Please check the hotkey list in the User Guide. You can also run the PF3 Display utility, found in the ...\PF3_Displayer folder which lists all the relevant hotkeys according to which facility you are tuned, although this ideally needs to be run with a seperate monitor or client pc, but at least it will show you which keys to hit even if you have to Alt+Tab to display it.
The one Hotkey you really needed to kick start everything was Hotkey #0, which you never used. I guess after 36 minutes you just stopped FS, hence the error.
Hope that helps but if not please come back and ask whatever you need to get you up and running and we'll do our best to help you along.