mtp help

when i on the toggel of full file system on customPFD its working well. then i toggel off ,and after 1 day my phone hang up so i soft reset it .but now the problem is that my phone mtp is not detected by pc... it just detect BOOTMGR MODE .after phone start device is nit detected,, can anyone help me. i only have lumia 720 + WP8.1.1+customPFD
main point i cant deploy any app
thanks in advance

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