It's not cured and therefore, isn't "bonded". Get it off and start all over. Epoxy isn't that exact in the mix, and can be off a little bit either way and still cure properly. If you were anywhere close to 1:1 and it didn't cure, throw it away and buy some fresh. Be sure the epoxy is at room temperature when you use it. The pieces to be put together should also be at room temperature. You can use graduated measuring cups, like come on the top of Pepto-Bismol bottles, to measure accurate amounts. These should also be available at your LHS in guantity.

Dr.1