On my CP 8865 3PCC the webinterface for configuration stopped working.
I can only access the phone using internet explorer (any newer browser won't work) and then log in as admin and advanced.
Once logged in, it is impossible to access menu items like "Voice".
It seems to me like a firmware issue. Is there any way to update other than through the webinterface?
Make sure you're pointing to the .loads file. As an alternative, try setting up a TFTP server.
You can send out the link you tried along with a PRT from the phone and PM it to me. I can take a look.