Thats a strange problem...make sure the card is in the slot next to the video card, and that if a scsi card is used, it should be in the last slot(one slot left- in the middle), Yes, the Digi cards are fussy about which slot you use, if not, call tech support, maybe they have an answer, and make sure all the extensions for Pro Tools Le are checked, and that the software is not corrupted in any way. Good Luck, Marc