Fixed it. Cheers Dee-ehn.
Just incase other have trouble the solution.
I took out all of the cables and cards and it beeped. First happy news I had.
So I put things back in one by one and it still seemed good. Untill I got ot the RAM. I put one stick in and it worked. Added the second and it stopped working. I though I had found out what was wrong. Just to check though I put the "faulty" piece in by it'self just to make sure. Guess what? It worked.
Now I was stumped. Both sticks worked but not together. Well to cut a long fiddeling story short I took out the motherboard and removed one of the metal legs that the motherboard is attached to that was in the middle of the board and hey pressto it worked with both bits of RAM installed.
It seems that the leg was causing the fault by tocuhing the motherboard and causing a short across the RAM slots. Well that what I am guessing happened.
Now everything is back in the new case and it is all working perfectly.