Hi lindap. I am having the same problem. Unfortunitly, no one on the forums will probably answer our game questions.
I am playing under 2 user names and I am stuck in the backyard area with a carp load of blue letters, a blow torch and a blue paint brush. I have even had to throw several letters away when my letter board got full.... several times. I tried a couple times to place blue letters in red slots, but they were rejected. I have been playing for a long time and all I get is blue!
The game is also buggy in the fact that I have to tinker with the options every time I start the game to get the graphic accelleration turned off so the game runs right on my PC.
Why doesn't BF go back to the developers and have them fix it? I am getting VERY frustrated.