Support SGS-i9000 won't boot after root! pls help!

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http://androidforums.com – Hi everyone i'm new to this site but anyways, I decided to root my galaxy s today and after i did the odin stuff, and installing the root, i noticed i picked the wrong one, i installed a root package (or something) for android 2.3.6 WITHOUT jw4 valuepack, but my phone runs on the jw4 so i saw there was another root for that one, now after i boot up my phone it stays at the black screen with the white letters saying: Galaxy S GT-i9000 and 'samsung' in the lower screen, it keeps showing me that for a few seconds, then the screen goes black and after that it shows up again all over the time. (General)