Fixture Library

I have a HOG 3 running 3.1.9, I had to down grade it to use a DP2000. The down grade seems successful and the console and DP2000 are communicating. here is my problem, I am trying to patch a show using some Elation fixtures, found the library containing the fixtures, the HOG3 reads the CD, shows the folders but does not see any fixtures to import. A HOG3 iPC, running 3.1.9 reads the disk and will allow me to merge the show to get the fixtures, but to no avail on the HOG3.....I made a show on the iPC, with all the fixtures I needed, saved it to disk, opened it on the HOG3 and viola,I have the fixtures.....why won't the HOG3 read the fixture disk directly....confused!