On which OS platform (Windows or Mac) are you trying to convert the file?
Does the file have a file extension? In case, the file extension is .QXD, then change it to .qxd and the then try to convert the file.
In case the problem still persists you can send me the file? I will try to help you. You can mail to me at email@example.com
Senior Technical Lead, Quality Assurance
QUARKXPRESS PUBLISHING R&D (INDIA) PVT. LTD.
A-45, Industrial Area, Phase 8-B, Mohali, Punjab, India Pin: 160059 firstname.lastname@example.org