Not sure if you can enter this command without a-off but try
fastboot erase cache
If that doesn't work I'd try firewaters universal s-off tool and obtain s-off and try that command or see if it fixes your issues with your device. if that fails your best bet would be to ruu.. if you can't do that either you got a useless device till s-off exploit Is found if that's the reason why it's messing up.... Or donate it to someone who could fix it (me)
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i tried this and no luck ,,,
actually i tried every thing but the problem is that the data does not change in the phone ,, i even formated (real format fsck) to /data and it was showing its empty but after reboot everything went back ,,, iam fixing android phones since htc desire but never faced anything like this ,,,
thank you for your help ,, and what you mean by donate and get it fixed ?