flashtool problem and problem returning to stock rom,any help ! Please.

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http://forum.xda-developers.com – Hello guys,i have recently installed CWM and CM from the following link. 'http://forum.xda-developers.com/showthread.php?t=2034639' but i didn't created any backup of my stock rom. so how can i go back to my stock rom. i have another problem.that is flashtool doesn't find my phone.although i installed the drivers it says 'drivers needs to be installed for connected device' 'you can find then in the drivers folder of flashtool' another thing is when i turn off the usb debugging then it shows that 'device connecte with usb debugging off' i have used flashtool and flashed my phone (HowTos)