In the WA_Globals file, have you set the $WAGLOBAL_Test_Mode variable to "true":
$WAGLOBAL_Test_Mode = true; //Set to true if you are testing your shopping cart and do not want to send information to your payment gateway.
If you set that to true, it will bypass the payment gateway, in other words, no information is sent to the payment gateway.
To use Authorize.net in TEST mode using power store, double check the following setting:
$WAGLOBAL_Gateway = 2; //Enter the appropriate value based on the above key. PayPal is specified by default.
$WAGLOBAL_Test_Mode = false; //Set to true if you are testing your shopping cart and do not want to send information to your payment gateway.
$WAGLOBAL_Authnet_Sandbox = "TRUE"; //Set to true if you wish to use the Authorize.net Sandbox for testing transactions.
We have moved support to the public forums. In the cases where we will need to see your files, or give a phone call top offer assistance, we will create a support ticket for you so you can supply the needed information in privacy.