Did you add the a new 'Generic SIP softphone' from the Phones menu in Web Admin first?
Then in the SIPDROID Account settings page on your Eken M003 add the following:
Username: what ever LinuxMCE assigned as the Extension for the new Generic SIP softphone
Password: again, what ever LinuxMCE assigned as the Extension for the new Generic SIP softphone
Server: the IP address of your core 192.168.80.1 by default
Port: Leave this as the default, it may need to be 5060 or 0, not sure.
I don't have a SIPDroid extension set up but I have a SJphone setup on my Win CE orbiter. So this is a bit blind but based on the settings I have on my device