I'm doing something wrong. i'm trying to locate a length of lateral. I have it about 50' before the location that it's broken. it's a restriction about 3' down between 2 mature trees. I chased the leak for a while this morning and gave up. i'm gonna re-route around it. so, i'm trying to find the pipe as close as possible outside the effected area. i tried to send a length of wire through the poly and track that with the 521, but i cannot get a definitive tone/void. i know the pipe is insulating the wire from ground. i've tried with 2 strand, twisting them together at the lead, connecting the red and black of the locator to them on the back side and nothing helpful. i tried connecting red to one wire and grounding black, and nothing. i know what i'm trying to do is possible, but i'm missing something. Can one of you higher ups lend a hand? my alternative is to re-pipe that section of the zone. (4 heads, about 120', hand dug.) I'd like to avoid that. any insight is much appreciated. pg ps. here's the hole i dug chasing the leak. it's a big hole, and i was trying to not cut out the main roots. and it was the helper's 2nd day, so he was less than efficient.