i have a problem getting to the recovery on my htc evo 4g NON lte bootloader

[geforceftw]

i am unlocked and had a root for a while but took it off and did my nandriod back up and went back to stock. i want to reroot and i cant get into the recovery i keep getting the phone with the triangle and exclamation point when i clock to go into recovery. i tried doikng the pc36IMG update to fix but i keep getting main version is older. and i can not figure this out. here is the picture of the error message and my htc evo 4g info. 
thank you in advance and if im in the wrong section please point me to the right place

 

[Rommer2258]

just to say you link is not right and i had the same problem with the thunderbolt on verizon, to get in recovery on a HTC phone, its volume down and lock key on start up, you need to do usb debugging and they you can go in a figure out how to fix it from there, yuo can do automatic roots that do it for you thats probably the easiest way.