Restringing = Humming???

[paniak17]

Ok, as most of you already know, I restrung my bass to a tenor tuning EADGC. I did not change the nut, mess with action, or anything else. I just Restrung it like you would normally only with dif. string gauges. My problem is my C string always buzzes, I dont think it's fret buzz, but I think its comming torwards the bridge. Once it happens, I just wiggle the bridge piece that holds the C-String and it's fixed for about another 10 min. of playing, then it happens again, it's really getting to me, how do I fix it?!?!?!?

 

[Figjam]

Sure its not buzz from the nut slot being too wide?

 

[LowEndLobster]

If it's not the nut buzzing, it's the saddles.