I see that the code is automatically appending "?x_login" to authorize_url. I had not expected that.
The "SERVER's CERT is NOT VALID" message still occurs, but I'll see if I can track that down now.
Torben
the parameter authorize_url is the URL of the listening credit card processing application. The gateway concatenates all variables that need to be passed to Authorize.net to this base URL.
/Bart