I don't think the DSP5200SL's will support v2.63, they may require an earlier firmware version.

From memory, the DSP5200.2's have a version of v2.63 and there is also a different version of the firmware for the DSP5200SE's.

You need to make sure you've got the correct firmware version for the DSP board fitted to the speakers.

Speak to an HH-friendly dealer and obtain an earlier firmware version. You should still be able to flash the speaker, even in its current state - it may take some patience and turning the speaker off and on a couple of times...

To flash the speakers, you ideally need a Cisco blue serial cable (and supported USB to Serial converter)

Good luck,

Steve

Main: 861v6 (LPS), 808v6, UHD722, DSP8000SE Anniversaries, DSP5200.2HC, DSP7200.2, SW1600, Sky Q, Cambridge Audio BD, Roon, M80
Office: 861v4 (LPS), 818v3, 800v4, HD621, M&K S150P, DSP5500HC, M&K MPS2810 sub x2
Son's system: 861v4, HD621, DSP6000.2, DSP5200HC, DSP33
Spare: MCD, 100 Series, 200 Series, 500 Series, F80s, C15s.