Error in Entity Framework

Question

I am using Entity Framework in my project but i am getting error like this
 
The specified named connection is either not found in the configuration, not intended to be used with the EntityClient provider, or not valid.
 
in app.config file
<configuration> <connectionStrings> <add name="NorthwindEntities" connectionString='metadata=res://*/NorthwinEntities.csdl|res://*/NorthwinEntities.ssdl|res://*/NorthwinEntities.msl;provider=System.Data.SqlClient;provider connection string=&quot;data source=TRIOM;initial catalog=Northwind;integrated security=True;multipleactiveresultsets=True&quot;' providerName="System.Data.EntityClient" /> </connectionStrings> </configuration>  
please help me
 
thank you.