LightMap Trouble. Please HELP.

Hi All, in my project i’m using alot of lights of which almost all will be baked out.this first shot is pre bake, lots of nice shadows on the pavement. but the 2nd image is what i keep getting from the bake. i’ve tried lots of different settings and watched a few Video Tutorials but still i don’t know what i could be doing wrong.
any help is appreciated

What are the current settings you have the lights and the lightmapping?