hellp with portrait lighting

Hi, I need some advice. I've been traying to understand what is wrong with this picture (lighting technique or exposure) in other section, but till now didn't get answear. Was thinking something is wrong with my cameras screen, then, monitor. Problem is that on cameras screen picture looked bright and walls looked white, when downloadet and apened with CS2 not picture not just looks darker but even walls are dark grey-blue.
I would like to ask you, which colore are this walls on ur computer screen? Maybe problem is lighting technique? Can anyone geave me some advise how to get right colores?
Thank you a lot

What picture is that exactly?

TJ

I don't see a picture but I can suggest that you not rely or make decisions about exposure based on what you on the 2.5" jpg representation on the LCD of your camera. Check the histogram and composition but never use the LCD for setting exposure.

Check your monitor first. It sounds like it may be out of adjustment. Also, look at other pictures on the same monitor and see what they look like. It may be the color is off there. If you know how to read a histogram your ahead of the game, as Robert mentioned: Tony

Thank you a lot for your replays, guys! Here is the picture i am tallking about. Histogram looks just fine and is difficult to correct the picture couse on the CS2 showing right exposure. I think, problem migh be with my monitor, even i did calibrated already, that's why wonder which color are walls on this picture on ur photoshop?

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Looks like exposure is right but it looks like your white balance is wrong.

Also, i did mesured exposure with L-358, just dont uderstand why do i see one colores in reals life, get almost the saim colores on the cameras screen and finally get absolutelly different (much darker) colores on computer screen? Aldo, here one guy has the saim problem and he asked to open his picture on ours monitors to see which tones do we see, and when i did this - on the net was one colores, but when i opened saim picture on photoshop - pictures was a bit darker....

What format are you shooting in?

I have 400D but this time was shooting in L and not in RAW format cause had problems to download RAW to my computer cause of Vista. Are you saying if I'll shoot in RAW pictures will look different to?

Thank you so much for all your replays!!! It hellped me a lot!