I had the same prob yo'. I didnt put these back on right. I know you say you did, but are you sure... In order for the strut's rod thing to sit there it has to be stopped from going down and from going up. If its not stopped then the rod doesnt compress/uncompress, instead it just moves with the bouncing of the car, staying uncompressed the whole time...

I had to just make my own contraption with washers and things. Took a few days to get it perfect.