"The Translation Provider could not be opened and has been disabled"

Hello Everybody
I'm making a server-Based  TM-provider Plugin ,
after run the program I can see the  path (correctly)like this->  Unknown:Servertm:///?tmuri=http://TMname,user,password but when the enabled-checkbox  is checked shows this message:could not be opened and has been disabled
could anyone help please! thank you in advanced!