I am having the same issue. I have a laptop connected via Ethernet, ip set to 10.0.0.1/8 and the wizard runs finds the modem displays the info:-
Speedtouch 585
serial no
mode operational
ip 192.168.1.254/24 & 10.0.0.138/24
product code 36029470
physical add mac address
firmware version 6.2.17.5
tp version 2.0.0
bootloader 1.0.8
board type BANT-W (QN)
----
etc
but when I select all of the firmware files I have found (585v6-uk-62t2.bin, st585v6-r62t2-bant-2.bin,st585v6_zzqiaa7.432.bin) it says not compatable.
So where can I find some compatable firmware?? (to hopefully solve my dns problems, see my other thread)
Ken