Texture problems

I've a really, really weird problem. I've recently added a mouse cursor to my game. But it's texture won't show up, instead the default one is used. I've checked the logs, nothing about texture not found. The weird thing is that it actually has the right size, but the texture itself won't show up. It seems like textures defined in jME won't show up, but textures on preloaded models do show up. To make it even weirder, tests do show the texture. Can anyone help me? :?

Maybe you're missing an updateRenderState?