Root Help urgently please

Hi, Im new here. Now i'm writing this to get a urgent help to fix my samsung galaxy y. Today i'd rooted this device successfully. and installed a ROM MANAGER on it [i don't tried anything with this]. then i tried to install a ROM [CREED4]. i did this by native recovery mode [ i cant see an custom recovery mode there]. after installing im restarted device, now it is BOOT LOOP problem, How to fix it please help me..:thinking::thinking::thinking::thinking: