Hi David,
I'm in the process of updating/writing a parameter test app so here's the initial flavor of it.
Be aware no all of this may work so you MUST run in debug mode to see what is going on. Some parts may not be complete. But it should help you debug this.
Try setting log on info first, UI you can enter the DSN or Server IP name, user, PW and Database and then on the right side you can use the dropdown to get the parameters.
Get the parameters before you try logging on to see what message you get.
Also, requires SP 14.
Don
Save the file and then unzip it. The output file has a .txt extension so remove the .txt extension and then unzip it again.