I tried reinstalling and formatting the sd card. dont know what to do..
Have you tried re-installing the current firmware?
does it happen in a certain Song?
in the Song i am working on right now i get nasty freezes now and then. i think it is related to the high cpu usage of that song, the more cpu hungry a Song gets, the more likely are random freezes. also i am pretty certain Deluge is more likely to freeze on low battery conditions.
there are strategies to reduce CPU (e.g. deleting unused stuff, resampling). for me this one would be really helpful http://forums.synthstrom.com/discussion/comment/10760#Comment_10760, as its hard to know for sure where the cpu hogs are.
dont know if this applies to your case. if you get freezes in any song, there is something else going bananas.