Dp or any tuner question?

[35thls1ss19]

Ok so i just installed my DP and love it! But snow is in the forecast for tom. SO tonight i hooked up my plow. I was in the 80 eco mode and when i go to move the plow its like the truck runs out of power and stalls? Only in drive. No in reverse? So could this have something to do with the chip? i didn't try it in stock mode or even 60 tow but i will be tom or ripping it out to plow. What else could cause this? I plowed 2 weeks ago and everything was great. Installed the dp last week and thats all i have changed. thanks for the help guys