I have MM4 and Dina so I tried this just for the heck of it. I loaded the Dina cr2 (this is the Dina 1.2, the most recent ver. I think) then loaded the Dina obj file. I selected a morph target and hit export. The file exported. I opened Poser, loaded Dina and applied the exported obj as a morph and it seems to works fine. Loading the Dina obj takes a long time. I just let it run and did something else for a while so I don't know how long it took. While loading I think the dialog was blank which led me to believe it might be hung. Exporting the obj morph takes roughly 15-20 seconds. The dialog may have blanked here as well, I don't remember. I'm running Poser 4.03, Windows 2K Pro SP2, 1GHz Athlon (old Slot A) and 256MB memory. Perhaps the problem is just the lengthy processing. Try letting it run for a while.

"Democracy is a pathetic belief in the collective wisdom of individual ignorance." - H. L. Mencken