Snow in a Globe

I am having trouble getting my snow particles to render inside a glass globe. The snow renders outside the globe fine but once i put it inside the globe it disappears. I tried turning the DEPTH to 4 or 5 but that did not work. There is something wrong with the glass material. Any suggestions?

Are you using Ray Transparency?
Try with Z Transp.

that did work but the glass has no thickness. Any way to add some thicnkess to the glass?