i have a htc magic which i rooted and installed the 2.1 rom. played around for a few weeks and i miss the features i had before and it was making my phone really sluggish. i tried just flashing the factory ROM, Version 3.03.990.6, back into my phone. i ran the program on the computer, followed everything and waiting. half way through the process it tells me theres an error and cant continue. it whipped out my OS and i had to put 2.1 back on my phone. how can i revert back to 1.5? how can i revert it back to factory settings?