Atv2 performance issues after jb

Hi, a little help required if you can please. I installed seas0npass 4.4 onto
my atv2 running the latest apple software and installed plex client and xbmc
ok. However, my atv2 is now running like a dog for example if you press left
on the apple remote it can take up to 15 seconds to respond alt say you press
right 3 times it may move twice and then pause then move the 3rd time after
10-20 seconds. Any ideas or help would be much appreciated thank you.