x86 ide to flash, usb to flash issue

Hello,

Running 6.15 no problem in a Supermicro Xeon server, in a ide to flash converter with a 256 mb compact flash (level4 license)
The issue is that if I swap to a usb to compact flash converter and using the same 256 mb compact flash with the license, my license get lost in space, it boots v6.15 but with a 24 hour license level 0,

To get back my license I have to boot with the ide to flash, we need the usb to compact flash converter.

somebody with this issue?

thanks

the licence is linked with media type and serial number, if you use USB, you change the media type,
force on bios to detect the usb as one hdd…