There are several files involved with this hair. I just downloaded "Koz_Long.zip" and installed it on Poser 5 and it works fine. You also need "appendix_files.zip" to conform to other figures besides the Victorias. Perhaps you downloaded and installed "LongHair_INV.zip" which requires that "Koz_Long.zip" be installed first. Did you remember to unzip the files?