Hi, can anyone help me with this one, it's really bizarre!!

I just created a new set of textures for a V3 character; I applied all the textures in Poser ready to create a MAT file for it. So far so good. I added resulting figure to my Figures library. No problems there. Then I quit Poser, and opened up the cr2 in MATconverter to create a MAT file. The MAT file was placed in the Pose folder, all done correctly. Again, everything went fine. I then opened up Poser again, and with a new V3 figure, I went to my Pose folder to test the MAT file I just created. There it is, looking lovely. I click on it... and Poser thinks for a minute, then asks me for a jpeg that I haven't got, never created, never had, and was never applied to the figure!! What's going on here?
When I cancel, I get the usual 'Do you want to keep looking for missing files?' error message. Clicking No, I wait and wait and wait, but Poser doesn't apply the MAT; it's doing something, but I don't know what. It should know where all the files are because I told it in MATconverter. Finally, I give up waiting and click restart; it's the only way out. Anybody got any bright ideas?

I'm using Poser 4.03 on a Mac, with system 9.2.2.