Authorize.net (AIM) issue

[spookcizzle]

Hello,
for my shopping cart, I have enabled the Paypal and Authorize.net payment modules. The Paypal is working fine and I am having no problems. When I try to use the Authorize.net module, I get the following error when I try a transaction:

"The merchant login ID or password is invalid or the account is inactive. - Your credit card could not be authorized for this reason. Please correct any information and try again or contact us for further assistance."

I believe it is called Error 13.

I called Authorize.net and they said my login ID and transaction key are both Correct and Active.

Does anyone have any ideas? The guy at Authorize.net said that there may be an issue where the zencart is not connecting to the proper URL. I wouldn't know where to begin with that, though.

FYI, I am using the most currect version of Zencart.

Thanks

[spookcizzle]

In addition, I have another Zencart on a different website with a different webhost (but same Authorize.net account and password) and that works fine.

Is there anything I can fix on my server to make this work?

Thanks.

[Ajeh]

Check for typos on like letters/numbers ...

For example, if you copy the Login and key from the working site and paste it to the broken site ... does it now work?

Are both sites on the same server?

If not, does the broken site have curl installed?

If all appears right and still broken ... uninstall, reinstall and reconfigure AuthorizeNet AIM ...