Few years back my account got locked out from xbox live because of ToS Violations (modified firmware).
With the release of Age of Empires Online I decided to buy some stuff from the marketplace, but I keep getting errors when trying to process the payment. On live.xbox.com I get error: FFFFFFFF0000006C and inside Age of Empires Online I get 80169d94. I`ve checked my details on billing.microsoft.com and everything is correct.
My only conclusion then would be that my account is locked from purchasing due to past violations?