Problem with color

[eve80]

Hi Everyone, I'm fairly new to photography and definitely new to this forum - I've read a lot of it but never posted.

Not so long ago I got a Nikon D5000 to shoot images of handmade products I sell. By now I think I found some good setting for shooting but two colors seem to be giving me a hard time: green and red.

I usually shoot in a light tent, then adjust the image slightly in photoshop - usually all I need is to adjust brightness and contrast - minor changes. But I can't get the greens and red right. Greens come out undersaturated (not enough yellow in them) and reds come out oversaturated - by a LOT!!!! While I can usually adjust the green in photoshop, reds are awful. I don't know what the problems is. Any suggestions?

Here's what I use for settings: Automatic Appreture and Shutter, no flash, no exposure adjustment, tungsten.

I know that vivid setting might not be perfect but it gets all the other colors just perfect - yellows are gorgeous, blues are fine, white balance is great - just the darn green - and even worse - red!!! I posted a pic to show you what I mean. No other colors are visible here but I have more products with multiple colors on them - all but reds and greens look fine.

Any suggestions? Thanks!