I just went through the same thing. The problem is that your bike has a freewheel. I believe the kits are for freehubs, the later technology. The best and probably cheapest solution is to buy a new wheel with the flip flop hub installed.
Thanks to all who have replied so far!
What I am getting is:
1) Take the adjusting things OFF. Will do.
2) Send back the Forte kit (thank goodness I havent opened it) it is for newer cassette technology
3) Due to reasons that will be clearer when the bike is reassembled the wheel will probably need/or be "better" re-dished
or
3a) maybe a better or cheaper?! solution would be to buy a new rear wheel ... some prices on the lower end for this please and suggestions of wheel and hub