Hello, GREAT PLUG-IN!

I'm using ZC 1.3.9h

Here's my problem:

I upload all the files, and when I try to install the sql patch, I get:
7 statements processed.
Error ERROR: Cannot insert configuration_key "" because it already exists
Warning Note: 1 statements ignored. See "upgrade_exceptions" table for additional details.
When I go to the Configuration > ZX Slideshow all I get is a blank page with the 3 columns and titles, but that's it (no way I can do anything on that page).

I've tried this putting back my backup sql copy and reinstalling few times, always FAILS.

What to do?

(I have the store on "maintenance" and I can't take it off for now, please let me know by pm if you need link with IP maintenance release to take a look).

Your help will be appreciated.