Epson 1080UB Picture help??

I just mounted my epson 1080ub on my ceiling and my question is i have the projector hooked up to my laptop using the HDMI to my laptop to my rec. and than HDMI from rec. to projector but when i run a HD movies from my laptop the picture looks ok... but i get this line that moves from top to bottom of the screen its kinda annoying... does anyone know could this be poor HDMI wire that can cause this by any chance?? i did use the a HDMI cable that came with one of my devices but not sure if this would case something like this?? the problem is a ran this HDMI wire threw the walls to my ceiling?? any help would be great!! Thanks

Csst

The house is 2 years old and the upstairs where the theater room was just done about 3 months ago... i do know the projector and the and the equipment is all on 1 circuit.. but i did the wiring for it... i made sure that those 2 out lets are on its own circuit all by itself because i knew it was going to be setup this way.. when you say grounding problem do you mean electrical wise? Where would the ground be the problem with in the outlet itself?

Also i just wanted to note it seems it only happens wheni play a HD movie threw my laptop my DVD and reg. cable TV seem to work just fine??

thanks for your help.. i will try that tonight when i get home... also just throwing it out theree if i try it and the problem is solved what do you think i can do to make this work if like you said makes the problem go away.. where there only a hdmi port on the laptop how would i be able to get sound out of it when i dont go threw the rec. i know im getting a little bit ahead of myself but i was just thinkin what i could do if what you say works.. thanks again for your help