Updating Forge questions

[JPC5]

Hi.

 

I'm currently in the process of trying to update Forge so that I can install the ID Resolver mod to my game. The current version I have installed is 3.2.5.120 and need to upgrade to 3.3.7.125. When I drag the 3.3.7 files into my .jar the game gets a black screen.

 

1) Do I need to reinstall all my mods in order to update Forge?

2) If not, am I installing incorrectly or is there anything else that I can do to help myself?

 

Would appreciate a response, thanks for reading.

[LexManos]

Stack trace, or ban.