Cycles map baking problem

Hi guys

I was trying to bake AO map using cycle render from my hi-poly to low poly model.I used “selected to active” feature but in some strange reason it gave me this weird black spots on my map.

Here is a link to AO map screenshot ( I highlighted parts with problem)

I tried to change base and distance vaule but it didn’t gave any results

No blend file to actually look at !!! Therefore not possible to give specific solutions so you’ll have to do the checking yourself

Check for normals pointing the wrong direction,
Check for duplicate vertices
Check for overlapping faces
Check for overlapping UVs

Okay i’ll check by myself, but also I upload blender file on file hosting site, so you can download it and give me some advices, if you want. Here is a link