Reply to My fist track! I need some feedback! :)

This is my first track, produced with ableton live. All the feedback you can give me is welcome!

http://soundcloud.com/mi_lo/dj-milo-ft-mousse-t-horny-2012




the first difficulty i found is to find "something different" to add into the 2nd part of the song, and try to put some sort of filler every 4 bars...