DFUse demonstrator not able to detect Board after i did in application programming

[Vprabhu]

I have implemented my own bootloader in flash starting from 0X08000000 and the application program runs from 0X08010000 and everything works fine , but after doing this the dfuse demonstrator not able to detect board in dfu mode, as i know the in system bootloader should be in system memory which is one time programmable and i dint touch that part at all, but why this problem ?

[Tesla DeLorean]

Make sure BOOT0 is pulled high when you plug in and power up the board.​

[Vprabhu]

Yes, i already done that , when i check on my Device manager it shows STM32 BOOTLOADER instead of STM32 in DFU MODE under USB device

[Hans T]

can you make a screenshot from dfu demo?

[Vprabhu]

Thank you, Attached here are the images , the dfu demonstrator does not recognize the board and does not display the board info.

[Tesla DeLorean]

Very odd, this is with a STM32F429 based board?

[Vprabhu]

Yes , also this issue started after i did my in Application programming project which works absolutely fine .