Installing new window trim?

[muddpile]

I just put in a new windshield and rubber. I have the old trim, and it's decent so I thought I'd use it over. I tried to put it in before the window went into the cab like I did the back window, but it would not stay in. I put the window in, and now the trim won't go in either. It starts and then pops out. Is the old trim not compatible with the new rubber or somthing? The new rubber has a really deep trim groove and the old trim has a very small clip setup, maybe sticks out 3/16" then bends inwards towards the glass. Any help would be great. Thanks!