Unable to connect to : null

android why I could not connect with my ocs server?

My configuration is:
Tag = test
Debug = not in the checklist
Automatic = not in the checklist
cache = checklist
cache lifetime = ok
system software = checklist
useragent compatibiliy = checklist
hide the notification = None
server URLs = address of my server
SSL control = on
Basic authentication = not at checklist
http proxy = not at checklist

I use a wireless network

Can anyone help me?