Loading Drum Kits????

I have an MPC 1000 and I have downloaded some drum kits from tha net. I saved them via USB to my Memory Card and I am now tryin to load them to the pads. Once I hit load on the file (Bangin' Beats), the screen acknowedges the load, but when I return to the main screen I cannot find the drum kit in Pgm: field.....I know this is a simple one, but help a newbie out....I'm hustlin' hustlin'!!!

C'mon fam! How do you open tha files once they are loaded?

What's the extension of the file you downloaded ?