mmx a311 reboot issue

Today I had factory reset my Micromax a311 which is rooted and running on stock firmware.
I have installed xposed and it worked well.
Then I installed viper4android and when i installed its driver and rebooted again then device not booted it got struck on bootlogo
I removed the battery and booted into recovery and cleared data,restore stock rom and cleared dalvik cache .
It worked but now every time i reboot i need to flash the stock rom again and again
Please can anyone help me....:confused:

Micromax Nitro A311 Usb Problem

Hey friends i got a problem. I am using rom cm 12 r39 the latest version of cm 12 in which both sim data working and everything else is working just one problem i can't use my usb neither file transfer nor camera ptp...in the usb debugging menu there is always set to usb charging can't change the value(see ss)..and when i click usb computer connection it shows "usb is now disconnected" while plugged in usb the same message...please help me with the issue..

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