Kid:
Lose the blue cabinets.
These grey things, what gives? You are regressing in skill.
Give your ambient a color like mauve. Make sun yellow. Jeez.
Generally every scene needs a little experimenting to get the light right. Thinking like a photographer would, place a key, model and fill light in the scene.
For ArchiCAD, start with a medium power light placed where th shadows cast help to "model" the space. Then soften the shadows with another lite and turn up ambient until it has a glow.
Or just give up until the LightWorks engine arrives. I know it is being held back unitl your currency, the Kangaroo Paw, improves in the world currency exchange. The Germans already have ArchiCAD 10 but you "downudders" still suffer.
You are wasting your time working in this archaic phong renderer from before you were born. Get artlantis or cinema and start practicing with a program that can help you make progress. The fun and development of your illustration skills will soften the pain of the cost.
Dwight Atkinson