authorize.net and zencart problem

I ma using " authorizenet_aim". When I submit the transaction, I have the following error

(TESTMODE) This transaction cannot be accepted. - Your credit card could not be authorized for this reason. Please correct any information and try again or contact us for further assistance.

Then, I use another valid credit card to submit again, this error popped up again.

Please help

1. What happens if you take it out of test mode?
2. What version of Zen Cart are you using?
3. What's your site URL?
4. Is your AIM transaction key good?

1. the zent-cart version is Zen Cart 1.3.7
2. I use production mode, I have the same error
3. my website URL is http://www.uhotstyle.com

Please help

I just generate a new transaction key from authorize.net and input the new transaction key into zen-cart, I process the transaction again. I have differnet error after I submit the credit card number to checkout

Email Error: Could not instantiate mail function.

Is your email from the site working?

rosetulip:

I just generate a new transaction key from authorize.net and input the new transaction key into zen-cart, I process the transaction again. I have differnet error after I submit the credit card number to checkout

Email Error: Could not instantiate mail function.

You also may want to check your setup on Authorize.net. You have to turn off test mode there as well as in zen cart.

rosetulip:

I just generate a new transaction key from authorize.net and input the new transaction key into zen-cart, I process the transaction again. I have differnet error after I submit the credit card number to checkout

Email Error: Could not instantiate mail function.

This means you've got a completed order (you can likely see it in your Admin), but when it tried to send the order-confirmation email, it found an email system problem.

Kim:

Is your email from the site working?

As Kim suggests, you probably haven't configured email properly for your server.

Try changing the "Email Transport Method" setting in Admin->Configuration->Email Options.

You can read some guidance documentation on Email setup here:
http://www.zen-cart.com/wiki/index.php/Troubleshoot_-_Email_Problems