DM48 upgrade 1.95 -> 1.97 & DXLINK card

Little morning joke…

Unable to connect to a DM48 in 1.95 with an S3000 in 1.97 to update the firmware of the DM48.
It was necessary to remove the DXLINK cards from the DM48 and the S3000 for connection and upgrade!

Has anyone ever had this problem?