tweeter pod in a pilar

I just made a tweeter pod . I super glued the tweeter pod to the a pilar. Then I super glued the micro fleece to the a pilar. Covered a fleece in fiber glass resin. I waited until it harden . I then used duramix 4040 to secure the edge of the fiberglass tweeter pod enclosure to the a pilar plastic. MY problem is that the duramix 4040 didn't stick to the plastic a pilar. I applied the duramix with the mixing gun. I let it harding for  over an hour before I touched it. I have used duramix before and it bonded to the plastic. Does antbody know of any other type of plastic adhesive I can use.

I used duramix 4040 its a urathane and it didn't stick.