Diffuse Glow Filter All Wonky

[JLalau]

My Diffuse Glow filter seems to be out of order. Instead of creating a white, glowing look, it creates a black one. Rather than a transparent white film, there's an opaque black layer on top of what should be all glowy. In essence, what should be white is black. Have I somehow messed with my default settings or something?

Does anybody know how to fix this problem?

Any help will be greatly appreciated.

[dave milbut]

is the layer you're trying to apply the effect to in "Normal" mode? (in the layers palette).

[Brian Cushing]

Check to be sure foreground and background are at default. If they are reversed, so is the effect.

[JLalau]

Thanks for the tip! But how do I check that?

[Brian Cushing]

Tools palette, 4th up from bottom. Black box should be in front of white.