Need to make a WK 3800 rhythm pattern

[Vitto Markell]

Hi everybody, I bought a Casio WK-3800 keyboard to play Cumbia. I've seen a lot of bands using a rhythm that I like too much, and I have it installed on my keyboard. The problem is, that pattern was created to run in a CTK 811 EX model, and my 3800 have problem with it. I'd be eternally gratefuled if someone can teach me how to make rhythm patterns or edit an existing one to play in wk 3800 well. Here is a song from a local band that uses CTK 811 with the rhythm that can be heard on this song and I want it to sound right like that, but in 3800.
http://www.4shared.com/get/r7vZfVSV/los_charros_de_lumaco_los_orig.html

The rhythm pattern can be downloaded here
http://www.megaupload.com/?d=MPDBLF2H

Many thanks