Authorize.net API and Transaction Key not valid or inactive

I am trying to test the form and I have an authorize.net sandbox account.

When I put in the API and Key provide to me, your interface on the form keeps saying that the numbers are not valid or are not active.

Hi,

It looks like your Merchant ID is incorrect or your Authorize.net account might be inactive.

Please double check with Authorize.net support and get, if possible, a new API key and transaction key for your account

if the problem persists after doing those steps, please let us know and we will be happy to assist you further.

Thank you for using Jotform!