Help! Too dumb for dummy proof root kit

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http://androidforums.com – alright sooooo. my optimus m was rooted through gingerbreak and on cm7 running cool as a cucumber. today i plugged my phone into my laptop and it needed to update the drivers; so i allowed it.... it updated my s/w version, stock reset my phone killing the root obviously; and put my phone into stock 2.2.2 ...... so that forced me to try and re-root using the dummy proof kit for 2.2.2. but when i tried to run the run first batch like it said and type a then press enter to start the root process, it just exits completely. so what do i do???? (General)