Fix the error When we add Library in Android

I want to connect your app with SQL Server database. For this connection i have tried to add up Jtds.jar file in Project library. After include this file when we click on sync now and Studio build the gradle and show this type of error.

Error25, 0) Project with path ':jtds-1.2.7' could not be found in project ':app'.
<a href="openFile:G:\Android Final Year Project Components\MyApplication\app\build.gradle">Open File</a>

What's the actual problem. Anybody help me about fixation of this error