APIs are not working for amount more than 1 USD?

 Hello Team,

I am new to Moneris Payment Gateway I need a help from your side. I have successfully integrated APIs to take payment and its working for less than 1 USD amount. But when we go with 1 USD or more than 1 USD amount then it shows an error. Please look into this issue: I receive this response:

"DECLINED           *                    ="

Please look into this issue.