I have the same problem.  Cash deposit at Walmart didn't go through for the first time.  I've used it about ten times so far.

Please help with this transfer.  I suppose I need either a MtGox coupon or for you to transfer the money directly into my MtGox account.

Hey there,
 
This is to notify you that your order has been updated, please find the details below:
 

To Redeem your MTGox Coupon (GoxCoupon field below): Log on to https://mtgox.com/. Under 'Funding Options' click 'Add Funds'.
 In the drop down menu, choose 'Redeem MtGox Code' and paste that code in the field.
 

OrderID: dc479115-adc3-4362-9f61-b48a063b6796
 EventID: d6128187-3387-4643-b347-53589f5a59df
 DestAccount: 74833
 QuoteID: ec264926-ef55-4bfa-9018-53cc3c347717
 User: SYSTEM
 DestExchange: mtgox
 eventtype: Order executed
 EventSentAt: 1363563471.46
 APIResponse: None
 GoxCoupon: {u'error': u'Must be logged in'}
 FundsSent: $480.05 USD