i have a problem with 2checkout gateway. I get "Invalid key" error. What is causing that? I entered correctly the Account number and secret word in settings. Test mode is "false" in Store settings. Demo setting is "On" in 2co settings page.
No matter witch setting i try:
i get Invalid key error.
I have EE 2.7.1, Store 2.0.6, PHP 5.3.27