You obviously didn't put it back together correctly. Don't feel bad though, I just rebuilt mine on my 03 kx250 and had a simimlar problem. Sounds like either one of the washers were left out, slid out of place or got put in the wrong place. Or maybe the springs are bad and are torqued down too much not allowing plates to expand. As much as it sucks, you need to just bite the bullet and take it apart and start over. A good idea that I learned here on this site is next time you do any work on your bike, take lots of pictures as tou disassemble things. Having those pics to refer back to can save you time, money and the all so common aggrivation!!!!