example for AIM getting started does not seem to work

[paries]

hello i am following https://developer.authorize.net/integration/fifteenminutes/#custom

1) i have registered and set up a test account

2) i have download the SDK

3) i have created the test.php based on the example from the tutorial above.

4) entered my API_LOGIN/transsKEY

when i execute the php i get the error

"AuthorizeNet Error: Response Code: 3 Response Subcode: 1 Response Reason Code: 103 Response Reason Text: This transaction cannot be accepted."

I then added

$transaction->->setSandbox(true);

i even edited AuthorizeNetAIM.php and changed

 const LIVE_URL = 'https://test.authorize.net/gateway/transact.dll';     

So where do i go from here?

Thanks for any help

Randy

[Trevor]

A response reason code of 103 indicates that the API Login ID you are submitting is being recognized, but the transaction key is invalid.  The best thing to do in this case is to log into your test accound and generate a new transaction key.  This will allow you to confirm that you have the correct transaction key on file and you can update what you havein your implementation.