Possible problem with process response.

I'm strangely getting
Payment failed for order 15: Credit card **purchase** declined: No Pre-auth corresponds to the store Id and order Id and transaction Id entered
in watchdog

The user message is

We were unable to process your credit card payment. Please verify your card details and try again. If the problem persists, contact us to complete your order.

but the transaction message is " APPROVED * =" from Moneris' side in my Moneris Solusionts eSELECTPlus transaction report.

I'm using Canadian Moneris in Production Mode.

Also I added a watchdog line mentioned in another post to see the mpgRequest object being passed.

mpgRequest Object
(
[txnTypes] => Array
(
[purchase] => Array
(
[0] => order_id
[1] => cust_id
[2] => amount
[3] => pan
[4] => expdate
[5] => crypt_type
)

[refund] => Array
(
[0] => order_id
[1] => amount
[2] => txn_number
[3] => crypt_type
)

[idebit_purchase] => Array
(
[0] => order_id
[1] => cust_id
[2] => amount
[3] => idebit_track2
)

[idebit_refund] => Array
(
[0] => order_id
[1] => amount
[2] => txn_number
)

[ind_refund] => Array
(
[0] => order_id
[1] => cust_id
[2] => amount
[3] => pan
[4] => expdate
[5] => crypt_type
)

[preauth] => Array
(
[0] => order_id
[1] => cust_id
[2] => amount
[3] => pan
[4] => expdate
[5] => crypt_type
)

[completion] => Array
(
[0] => order_id
[1] => comp_amount
[2] => txn_number
[3] => crypt_type
)

[purchasecorrection] => Array
(
[0] => order_id
[1] => txn_number
[2] => crypt_type
)

[opentotals] => Array
(
[0] => ecr_number
)

[batchclose] => Array
(
[0] => ecr_number
)

[cavv_purchase] => Array
(
[0] => order_id
[1] => cust_id
[2] => amount
[3] => pan
[4] => expdate
[5] => cavv
)

[cavv_preauth] => Array
(
[0] => order_id
[1] => cust_id
[2] => amount
[3] => pan
[4] => expdate
[5] => cavv
)

)

[txnArray] => mpgTransaction Object
(
[txn] => Array
(
[type] => purchase
[order_id] => cs021612205100000015
[cust_id] => 1
[amount] => 114.29
[pan] => *************0005 <- I ALTERED THIS As it's a real card number
[expdate] => **** <- I ALTERED THIS As it's a real card number
[crypt_type] => 7
)

[custInfo] =>
[avsInfo] =>
[cvdInfo] =>
[recur] =>
)

)

Any thoughts would be great. Thanks