Sounds like you're making it right. Did it look like this?
What kind of chocolate are you using? Did any water get into the mixture. Water will ruin chocolate. I have made modeling choco many times and the only two times I had issues was when I over heated the chocolate or when I had water in my measuring cup. HTH
No problem 
I was freaked out the first couple times I made it too, but now I love the stuff!
still didnt work... i dont know what i'm doing wrong...
i used "super" white merck's chocolate...
it was ok when i kneaded it BUT when i rolled it..it kept crumbling on the sides and broke in half when i picked it up...
I know i didnt burn the chocolate because i checked the temp.
I'm not familiar with Merck's chocolate. I've made quite a few batches over the last several weeks using Baker's brand chocolate, both dark and semi-sweet. Are you letting it age overnight in the fridge? You have to knead it really well to get it soft and pliable but it will dry hard again after it sits. Are you trying to get it really thin? I haven't made flowers using it so I've not dried to roll it thin.
Also how much chocolate is it? The ratio I've been using is 1 lb. candy melts to 1/3 c. corn syrup. The candy melts I use are by a company called 'Candymaker'.
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