Exclamation [Q] HTC DESIRE HD RUU not working bootloader dosent load

Hi Guys i need some Help im trying to root my HTC Desire unfortunately When i do the Devboot to unlock it recognizes ok but when i turns it off to go to boot loader, it just stay on the HTC logo and dosent go to bootloader... This is resulting in an error 701.

Did anyone have this problem before. I realy need some help on this one as i cant find anything to root this phone Thanks

Specs:
HTC Desire HD
Andriod- 2.3.5

HTC sens 3.0

Software number
3.13.707.4