Plutonium

When I'm In Menu I Have 60 FPS When Its Loading Its Between 10 And 30 When Im In Game Its 20 To 10, 30 Somtimes PLS Help
Specs:
AMD R2 Graphics
AMD E2-7110 APU

When I Get On Zombies Mode And Try To Join A Server It Telles You Have Been Disconected From Bo2 Servers PLS HELP