Isolated Ground causes ground hum.


Hi Experienced Goner.
I am adding the isolated ground into my music system and when I connected the ground wire into my existing system and it hums badly.
Did I do st wrong?
 Thanks 
Calvin
dangcaonguyen
Thank you everyone,
I will remove the isolated ground system and put my music system back as before.
One last question:
Do I have to remove all the ground rods I already planted is in the ground? Is there any issue if I keep them there? Its kind of hard to remove those rods now.
Thank you all for your help.
Calvin
dangcaonguyen
Do I have to remove all the ground rods I already planted is in the ground?
No, you could bond them together with your other existing ground rods.
Do I have to remove all the ground rods I already planted is in the ground? Is there any issue if I keep them there? Its kind of hard to remove those rods now.
No problem with leaving them there. I would remove the ground wire from the rods from the inside of the house. Cut it off outside the house or bury it in the ground outside the house.
One major thing I've learned over the years of reading the Audiogon Forums is you never can go wrong following the advice of jea48, gs556 and several others that I have not mentioned. Thank you to all those prefessionals...
"I only connected it to the ground post on my Shindo Aurieges preamp. "

Isn't the purpose of that grounding lug as a place to ground your turntable or phono preamp?  I assume the chassis of the preamp is already grounded.