Auth.NET Akami Testing failing with new sandbox URL

Language used - Salesforce APEX

We are testing Auth.NET akami integration testing using the following sandbox URL. http://ift.tt/1SlTpIo

We are getting the following error code - E00007, it looks like the credentials we are using are not correct. Can some please contact us with a resolution.

NOTE: It is working fine with the following sandbox URL "http://ift.tt/1lOlaxX" with the same login id.

regards, Arup