Sad to say my experience of trying to add a credit card to enable my F2P account to be upgraded to VIP has been the same as a number of others, namely having entered my credit card details on the Payment method page i get the same error message 30005.
The drop down menu descriptions of UK counties (equivalent of your States) is a little odd too Herefordshire is referred to as Herefordshire County which is not correct and could be a source of error messages
Hardehar at post http://forums.ddo.com/showthread.php?t=272443 had exactly the same experience as me
I am in discussions with my credit card to see if they can identify the nature of the problem, as well as signing up for another credit card to enable me to try another card.
I really really want to upgrade to VIP but so far am drawing a blank finding a way to pay Turbine
Frustrated DDO Vet
Vik