Sandbox API calls are returning blank

[starweb]

I am having trouble using the sandbox environment right now.  If I use the production environment my code works perfectly.  If I use the sandbox, nothing is returned.  I've double-checked my authentication multiple times, even reset the transaction key but nothing works.  I don't even get an error if I send it a fake transaction key.

I am using the following endpoint for testing:  https://apitest.authorize.net/xml/v1/request.api

I'm specifically attempting functions related to the CIM.

[RichardH]

Hello @starweb

This would suggest you're unable to make a secure connection to the sandbox endpoint.  You might consider logging the connection to learn if there is an error while negotiating.

Richard