Upgraded to the newest version, have problems with collision...

Hey, so yesterday i upgraded. It is driving me crazy, whenever my bullet collides with the enemy, its not working properly. Any ideas whats going on?

Check whether you are doing:

void OnCollisionEnter2D(Collision2D col)

or

void OnTriggerEnter2D(Collider2D col)

Or try both and see if it works.

I did use 2d functions, dont worry. Meh, anyway, i got the later version and it fixed it. I guess thanks anyway for trying to help.