We have recently installed MoviePlus5 in two classrooms on our school network. The codecs have recently been unlocked and appear as 'unlocked' in codec manager (when logged on as either a student or member of staff). However, students cannot import mp4 files - it states the correct codec is not present. When imported under a staff logon, all works well. The instructions regarding registry files has been followed and checked by Serif, but still no joy. I thought it could be a permissions problem and granted relevant permissions to the program folder, but still not working. Can anyone help?