I have been using Vray with sketchup for a while and one of the things i do often is use PNG billboards as entourage in my models. Now i'm in a new office where we share a dongle license and i'm running into an issue i haven't seen before. After loading the vray license and opening my model, some of the png textures are just gone. Instead of the linked png texture, they are replaced with a simple grey material with no mapping whatsoever. Anyone else seen this? See the attache screen shot.

Thanks in advance for any advise!