nRF51 DK does not go in to bootloader mode

[pltv]

I have tried a lot but my DK wont enter in Bootloader mode, or atleast the Bootloader folder does not show up in my Windows 7 machine. I am able to do that comfortably with the other DK board i have. Should i assume that the board is broken?

[pltv]

Yes it does. That behavior is same as the other Board that works fine.