Dan,
I have tried both and they appear to work properly. Is it possible that your customer has not installed TINA-TI? If you download both files, TINA-TI v9 opens them both properly. If your customer is using TINA-TI version 7, the projects will not open. If that is the case, your customer needs to upgrade to TINA-TI v9 (the version on the web currently).
Britt