Is Adagio Ledger 9 installed in the same place as your AP81A and other Adagio programs? If not, then this would also be a problem. It's possible that the 9.0A upgrade didn't install to the location you think it did.
Here's a quick test - open your Adagio Ledger 9 program and from there, load Payables from the Adagio menu. If you don't see Payables in the Adagio menu list, then the programs are not installed in the same location.
Check the shortcuts you use for starting both Ledger 9 and Payables. In the Target and Start In paths, everything has to be the same up to the Program directory - for example, K:\softrak\Ledger\Ledger.exe and K:\softrak\Apwin\Apwin.exe.
I've seen someone who accidentally installed the Ledger 9 upgrade to the K:\softrak\softrak\Ledger directory, which also caused the problem you are running into. If this happened, then you would have to re-install Ledger 9 to the correct location and make sure the shortcuts are correct too.
_________________________
Regards,
Softrak Tech Support