Ska rhythm

Hey everyone,
I am having trouble getting ska rhythm guitar riffs. I've tried hard to listen and find the tab and play but I just can't seem to make it the same. I know there might be peddles involved that I don't have but without peddle I cannot play it. I've recently tried learning a song called, "Pizza Day" by the Aquabats and the riff goes:
e 6 1 2 3
b 6 1 3 4
g 7 2 2 3
d
a
e
and the ska guitar repeats that until the verse which is a simple power chord riff but that right there is what I can't get. I've listened to many ska influenced bands such as "goldfinger, aquabats, The Hippos," and alot of different bands and I just don't see what they are doing. If someone could help me that knows how to do this with ska-upstrokes and downstrokes then it would be most appreciated.
:-=(Nekro)=-:
" [email]Itstimfromschool@aol.com[/email] "

Ska rhythm is basically playing the chords on the upbeat. (not exactly but I'll use that to explain). Ok say you count 1 & 2 & and repeat. You play a muted dowstroke on 1 and 2, and on the &'s you'll up-strum the chord. So it would look like this.


1 & 2 &
--x--6--x--6--
--x--6--x--6--
--x--7--x--7--
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It's alittle tough at first, but just think of playing a straight rhythm. Your muting the strings when you play a downstroke, and your playing the chord on the way up. Start slow and you'll soon get it.