Dominic :
Since the CuteChat3 move the CuteSoft_Server folder to CuteSoft_Client ,
you need to specify the server files(Languages,CDQ,Avatars..etc) location too .
to implement that , please change the web.config and add
<appSettings>
<add key="CuteChat.DataDirectory" value="YourDirectory\CuteSoft_Client\CuteChat" />
</appSettings>
This is physical file system path , so please don't use "~/" in front of the value .
Hope this helps .
Regards , Terry .