URGENT HELP !!! ADMISSION XSARA I COLLECTOR

I am desperate I have spent all day and I have not been able to get the admission collector. I explain the summary a little and send a photo to see if they can give me a hand.
I have taken 6 screws from the approx. That I show in the photo, and some more that belong to the escape, but the admission collector would have to leave, moves ... but nothing as if he played somewhere, it seems that he is more detached from above, from below, I would swear that he has all the loose screws, but nothing, giving him a nylon mace, moves but does not come out.
It occurs to you where I can have the problem ???? I'm going crazy.

Thank you.


I leave the picture link;
Farm2.static.flickr.com/1088/5136941764_D2898E984C_Z.JPG