Rear panoramic curved window!!!

[My98Disco]

I removed the rear upper curved panoramic....I-don't-what-else-to-call-it window & thick rubber seal of my 98 Disco to take care of some ugly rust AND now I CAN'T get it back in!!!!:banghead:

NEED HEEEEEEEEEEEEEEEEEEEEEEEELP!!!!!!!!!!!!!!!!!!!!!

Any ideas or suggestions????

Thank you. Daniel.