Please Help!!! Cyanogen Mod hanged on startup.

Hi everyone,

i rooted my galaxy s3. clockwork -> cyanogen mod (cm-10.1-20130518-NIGHTLY-i9300.zip).

then i restored the previous rom via Rom Manager.

After that i wrote cm-10.1-20130518-NIGHTLY-i9300.zip again, but this time i didnt check wipe option on Rom Manager

now it hangs on phone startup. what can i do. please help.
i have very low experience on rooting.
:(