Any Ideas?

[Matthew298239934m96]

When I try to move the image to my other document it goes grey????? any ideas?

[TheDigitalDog]

That 'other' document is grayscale, that's why. See it listed as such in the top by the file name? 

[Nancy OShea]

It's not possible to put a color image inside a grayscale image.

However you could put a grayscale image into a color image. 

Be sure to reverse the layer order so color layer is on top.

Hope that helps.

[Bojan Živković]

If you want to move color image in that document go to Image > Mode > RGB Color or you can use Edit > Convert to Profile choose RGB profile like Adobe RGB (1998) from Destination Space drop down list.