Need some help PLEASE

I am using I am a level 90 DK and using Lazeyraider
and using singlar as my cc.
when i am in a raid or in LFR my DK keeps using Death grip and taking agro from the tank
in witch i die most of the time
is there a way to turn off deathgrip or am i doing something wrong
can any one help me please

 

Check "Enhanced Mode"
Click "Class Config"

 

ok i did that and there is nothing there that will allow me to remove death grip

 

Change Combat Routines

 

what one do you or any one think would be good i want hight DPS
i dont do alot of PVP just alot of raids

 

for hight dps pick one with name lazyraider