Well if your Knox flag has been triped I don't believe that any Knox features will work.....I say your best bet is to Odin to stock and try from there
If i helped hit the thanks button.
Current Device: Samsung Galaxy SIII (SGH-I747)
ROM: Stock Touchwiz Rom
Kernel: Stock 3.0.31-2024954
Previous Devices: Motorola Droid 1, Pantech Crossover, Motorola Droid X, LG Revolution, Sony Ericsson Xperia Play (r800x)