Boot camp partition problem

So yesterday after long delayed time, i upgraded my macbooks hard drive and installed snow leopard. i divided the partition into two. a 500gb main startup and a 750 secondary. I want to use bootcamp but i get an error saying
"the mac partition must be a single partition"
I dont want to have to reinstall everything over again. is there a way i can make the hard drive into one partition or somehow pass this?
im running a 2007 white macbook
2.2Ghz core 2 duo
4gb RAm DDr2
750gb hard drive

let me know thanks.

sorry made a little error, have them partitioned as 500gb and secondary 250gb both mac osx extended journaled. And this is the error i get when trying bootcamp exactly:
"The startup disk cannot be partitioned or restored to a single partition"
The startup disk must be formatted as a single mac os extended journaled partition or already partitioned by bootcamp to install windows"

whats that mean? i gotta repartition the drive to full 750gb?

 

s.