URGENT help needed

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http://androidforums.com – I flashed the mikG rom about 2 hours ago and I was using "My Backup Pro" to restore my apps, data, etc. Everything restored and I rebooted. Well it never rebooted. It won't get past the white "htc evo 4g" screen. I go to recovery and tried to restore with the nandroid back up and it says the sd card is not mounted. I don't know what to do! (General)