[Closed] gamma settings and Bitmap UI element

Im having trouble getting an image to display in the right gamma when the Gamma preferences for input gamma is set to 2.2. The images come out too dark.
I have tried opening the image file using openBitmap and then setting the gamma property from 2.2 to 1 but it still displays too dark when assigned to a bitmap UI element.

IDisplayGamma.gamma = 2.2
 MyOpenBmp = (openBitMap MyBmpFilename)
 MyOpenBmp.gamma = 1
 myRollout.myBitmapUI.bitmap = MyOpenBmp