Grayscale image turns purple?

Lately I have been experiencing this weird problem. Every time I try to convert my image to grayscale mode, instead of just being black and white the image turns purple. Is there anyway to fix this problem?

Normal image before:


Image after being converted into grayscale mode:

Adobe Gamma.

I have no idea where it'd be because you have a mac, sorry.

Oh no, I have a windows, XP to be exact.

Just re-run the Adobe Gamma set-up.

Don't start with an old profile and try to fix it. Create a new one.

Want help? Good instructions can be found at the following links. Read and use the information in conjunction with each other:
http://www.adobe.com/support/techguides/color/gamma/gamma.html
http://www.computer-darkroom.com/home.htm
http://digitaldog.imagingrevue.com/files/II-PS6ColorManagement.pdf

and try not to link the pics directly into the forum ... but do what utopian said.. and all shall be fixed

Thanks for the help guys, it works! :D