Sudoku3

Can someone please tell me why my code fails on the 7th and 11th test case, or just give me the test cases :P. This seems like a simple task, but I don't know what I'm missing. My source code is:
http://www.z-trening.com/submit.php?submit=7100059429&subm_code=1

I had similiar problem.
Maybe this can help you:

http://www.z-trening.com/forum.php?show_board=10002&ref_id=10002&view_topic=111819

o thx, this helped :)