GTK+ error at runtime in Mint Linux 14 Maya

After installing DraftSight  in Linux Mint 14 Nadia (based on Ubuntu) with Maya desktop I get the following error message when trying to run the program: "Failed to load modules. The application will close.Please reinstall the application." Re-installing doesn't help.Running from a terminal also shows "QGtkStyle was unable to detect the current GTK+ theme.version = 12.7.347" .I had this running OK in Mint 12 after satisfying package dependecies and using --force to install (except for having to re-install after system updates).Any help would be appreciated.