Make drag and drop object not pass through solids

My game is almost ready and I have just one more problem that I have been unable to solve myself. So maybe you guys can help me with this.

So I have this draggable ball that Im trying to make stay on my "playfield". I have solid walls around the playfield so other balls cant leave it but my draggable ball just ignores them for some reason. I have tried to make my ball solid, disable dragging on collison and on overlap but nothing works. I bet youll undestand this better if you see it for yourself.

dl.dropboxusercontent.com/u/32241884/Games/CAPX%20Files/dtbz.capx

I know the project is a little bit ugly but this is the first game Ive made with C2 so try to undestand :D

I made a Klotski example a little while ago for someone else that dealt with this issue by forcing the object to be dropped as soon as it touched certain blocks. Here it is.

The easiest way to restrict position of an object is to use the expression clamp.

example:

clamp(sprite.x,0,640)

clamp(sprite.y,0,480)

Thatnk you GeometriX. That worked perfectly.