Graphics in groups

[Richmond Mathewson]

Why, when I do this:

putthebackgroundcolorof(grc "h1" ofgroup"JK5")

do I get:

Error description: Chunk: source is not a container

Hint:

[useful hint, by the way]

?

Interestingly enough when I do this:

putthebackGroundColorof(btn "B2" ofgroup"BUTTS")

I get this:

Error description: Chunk: error in object expression

NOW, I thought that was how one refered to members of a group.

Richmond.