Support please help me root my Rush! :(

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http://androidforums.com – I bought this phone toward the end of may just getting back from Afghanistan. It did a complete system upgrade a few days after I got it and I wasn't able to root the phone at the time before the upgrade and now I've tired to root the phone dozens of times to no evail. I'm wondering if the update might have something to do with hit. I've followed the steps in the guide to a "T" and nothing... is there a way to roll back the upgrade and try to see if that will work? Please any help with this would make me so happy! I'm at my wit's end here :( (General)