Can you reach out to cfinstal<AT>adobe<DOT>com with your server info.
Last time I did that Adobe asked for my Extended Support ID which I don't have. I told them I didn't have one but offered to purchase one. No one ever responded so I was left on my own.
I have emailed them. Waiting for response.
I havn't received your email so far, I have sent you a private msg with my contact details. I have just worked with another user and fixed their problem.
Can you please uninstall the Update 14 and reinstall it manually. Recreate the connector and try again.
In all likelihood, the following blog post should explain the cause and provide the solution to the issue you are facing:
The problem ended up being some 3rd party JAR files that had been installed in our cfusion/lib/ folder long ago. After moving these files to their proper location (cfusion/wwwroot/web-inf/lib/) update 14 installed and CF Admin access was restored.