Wow,
Ok where to start.
First, laser collimators don't work on SCT's you need a fixed point source. Either a real star or an artificial star. Then you need to defocus the image until you get 1-2 rings. Then make adjustments to get all the rings concentric. You cannot use a focused star to collimate unless you have superb seeing 9/10 so you can see the airy disk and only then you would be making very minute adjustments.
By the sound of it, you have collimation so far out that you will need to do the white paper trick to get it close. So here is how that goes.
Get some white paper and punch a small hole through it. Set your scope up and lay it horizontal so that you can see all the reflections. Use the white paper by moving back far enough to see 3 distinct images. You will now see how far out your collimation is. Move one of the knobs and then go back to the same place and check to see which way it moved. Keep doing this until you get each reflection concentric
This article shows in more graphically.
Let us know if there is anymore we can help with.