I wonder if there is a problem with the workstation that you are using. Create a new workstation on your machine and enter the application database and redo Print Account Ledgers > Simple on some of the accounts you have mentioned.
If this works, select Default Setup on the report title bar and click setup using the original workstation.
I would need to see a copy of the application database as from your posting you seem to have checked the Print > Account Ledger settings.
Regards to All,