yeah, your right lol. well, where did you get the replacement from? maybe its just not the right one? i doubt that though. hmm, do you have a dremel tool? you could try just lightly filing it down until it will fit, but not too much that it will shoot right out of the top. does it get stuck half way down the tube, or will it just not go in at the top of the hole? i wish i was there to help haha.
this is what i bought... its not original, but it was cheapest and it works.
http://www.autohausaz.com/search/pro...d=1332@Antenna
it looks a little different from yours.