Electro Harmonix True bypass MOd-HELP

[bassman515]

So last night I wired the whole thing up....I did not use the wires for the original "bypass" circuit in my wiring.  Now I have a very loud hummmm when I engage the effect....but a nice clean sound when I have it in bypass(true) mode.....\

what have i done wrong?

[aron]

Well, somehow you have miswired it. Triple check your wiring. At worst. put it back the way it was.

[bassman515]

The wierd thing is that the effect works there is just that hum..... and it is even louder if I unhook the guitar.
If I run the wire for the original bypass circuit it eleminates the hum, but also the effect,. From what I can see i have it wired right I just wonder if anyone else has done this or had the problem....

[LyleCaldwell]

What EH product is it?

[A.S.P.]

hook a wire from ground of input-jack to ground of output-jack ("sleeves").