I was just told by MTGOX that after 24 hours, bitinstant recalls the mtgox codes to their own account, and so the code that was emailed to me did not work. I made a deposit on 4/3/13 and it has still yet to show up. here are my details:
 
OrderID: 9b6b957d-40de-41f6-a17e-8bed5be2ba2c
EventID: cddd62bf-4456-4b48-a1f0-575a01a7c26d

any help would be greatly appreciated as this is 500 dollars i can't afford to lose.

thanks.