Hello:
Please download the cutechat2 for dnn .
Please check the code in DotNetNuke\Web\DesktopModules\CuteChatControls\
It's a sample , you need to write two classes as the CuteChat2 Provider :
Public Class YourDataProvider
Inherits CuteSoft.Chat.DataProvider
Public Class YourUserAdapter
Inherits CuteSoft.Chat.UserAdapter
Regards , Terry .