Have you managed to complete the flashing process?
If so, which firmware image did you use?
If you haven't managed to get that far, try this:-
Close your browser.
Press the reset button fimly to ensure it is fully depressed.
Power up the modem, keeping the reset button firmly depressd for
10 to 15 seconds (in other words a long reset).
When the modem has completed booting up, then open your browser & go to 192.168.1.1
You should now see the firmware updating page.
Assuming you manage to install the updated firmware, the modem will reboot itself.
Wait for 3 minutes as it appears the modem has rebooted part way through, but it hasn't yet completed.
Exit your browser.
Open your browser again & then try 192.168.1.1 to get to the login page.
If you are using Asbokid's original unlocking firmware you should see the modem's GUI & have access to it via telnet (using the modem's LAN2 port).
However, it is likely to be remotely updated by BT within a few hours or a few days. At which time you will lose the GUI, but still have access via telnet.
Firmware versions (including BT's updates) can be obtained via this site:-
https://mega.co.nz/#F!LdJFDIJL!e_E1twsIg2kTet8mPjrb4wIf you want to permanently reinstate the modem's GUI, one of the versions from the Experimental area should work.
Once it's all working, you should be able to connect the modem's LAN1 port to your router as normal for internet access & by connecting the modem's LAN2 port to a spare router port, you should also have access to telnet & the modem's GUI.