Help Cydia problem!!!!!!!!!!!!!!!!!!!!

[Kingjo131]

every time i start cydia, the screen gets black as if it were about to open, then it crashes and returns me to my springboard. i noticed this problem about 3 days ago. i looked everywhere for answers, but no one seemed to have information on my device

ipod touch 2g
ver 4.1
greepois0n jailbreak
MC model

can someone out there please help me ! please reply !!

[iYeow]

Do a restore and jailbreak again, it should solves the problem.