No sound in editor when scrolling or scrubbing etc

If I click on a wave form and it goes to the editor, I cannot get sound with the play, scrub etc
I use an iMac, with 10.5 and all updates done, but no sound in the editor window.
Also they do not seem to play together in sync. I would assume the editor and main screen play simultaneously

Hi and welcome,

Enable Control Room, add Monitor 1 Bus and route it to your output. Set Stereo Out to Not Connected.

All previews are routed over the Monitor 1 bus.

Martin, thank you SO much!!
What a relief!!
I thought I had major problems!
So kind of you to help me out. If you ever have a question about TVs, you come find me, I owe you one.
Cheers, and thanks!