i choosed pink but it colored the image gray! how do i fix my brush color in Adobe?

[patsoo]

i was about to color the image background pink but when i applied the brush into the image, the color of the brush turned GRAY! no matter how i keep changing the brush color it just keeps on turning back into gray. HELP ME! btw, i'm using Adobe Photoshop cs3...♥

 

[Stasha-Pistachio]

Thats because its set to grayscale.
It needs to be RGB to colour. (or another mode, but I generally stick to RGB)

Image>Mode>RGB
Its pretty easy to change