State Bank Of India (SBI) — About debit card transaction authentication

Address:

Nagpur, Maharashtra

I have bought an online payment gateway 2checkout.com (2co.com) for my website. Whenever I try to pay $1 refundable verification fee on 2checkout.com website through my SBI Mastercard Debit Card, it comes with "Authorization failed. Please verify the credit card information and try again, or enter a different card." this error. And suddenly I receive sms from SBI saying "Your transaction at POS 00100369 declined due to authentication failure." Because of this, I am unable to receive payments through my website. I have contacted with 2checkout support team, they said that, this problem is from SBI side, as they said "SBI needs to authenticate transactions made with name of 2checkout or 2co." and when I go to SBI branch, they don't have any employee who can understand this problem. Everyone says, I don't know how it's happening. Do SBI have any expert IT support, who can solve my problem? I need to verify my 2checkout account urgently. My website receives daily payment upto $500-$1000. But I am unable to get those into my account.