I think the rom is not installed correctly.. try installing it again by doing these steps..
1.Install the stock rom and then install percy_g2 CM #2 kernel
2.After completion switch of phone and..go to recovery (press volume up+ home + power)
3.Go to mounts and storage and format system,data and cache
4.Go back and wipe data and cache
5.Again go to mounts and storage and mount system,data,cache and sd card.
6.Go to install zip>choose zip and select the rom
7.Wait for the installation to get completed.
8.After the installation is completed,go back and wipe data (don't wipe the cache partition this time)
9.Select 'Reboot system now'
10.Wait for the rom to get booted