13IS250C

Hi guys. I haven't posted here in a while but I have an issue that has started and I wanted to see if anybody could help me out. When I put my top down, as soon as all the package tray parts fold up and the trunk starts to come down I get a popping sound from the mechanism on the driver's side. It seems to be getting louder. I have stopped it in that position and looked at everything and I don't see anything binding. Any suggestions? Thanks in advance.