I doubt you did anything wrong there, it's just screws holding it in, nothing electronic or attached to the engine - i took mine off with no trouble
Probably just a coincidence to be honest, you checked the wiring? it tends to come lose - try pushing the brake wires back in quite hard, mine did that.
As for the starting trouble is it the kickstart too or just the electronic ignition? if its both the spark plug could be the problem,
Mags, July 2007