[LAU] qtractor 0.4.7

I want to build qtractor 0.4.7 with vst hosting capabilities so following the instructions in the README.VST text file I downloaded the vst include files, placed them at root in '/usr/include/' and proceeded to build qtractor 0.4.7 on Ubuntu 10.10 by the way, I'm using the 2.6.35-24-generic kernel (since it works with broadcom drivers) the './configure' got as far as looking for the jack libs (which I do have installed and am using on a daily basis) and failed here is the error message from './configure': 'checking for main in -ljack... no configure: error: JACK library not found.' is there something in the jack lib that wasn't installed or is there a path I need to fix somewhere? any help is appreciated! KIM