java.lang.classnotfoundException: com.microsoft.sqlserver.jdbc.sqlserverdriver
You dont need both jTDS and JDBC in your classpath. Any one is required. Here you need
only sqljdbc.jar.
Also, I would suggest to place sqljdbc.jar at physical location to /WEB-INF/lib
directory of your project rather than adding it in the Classpath via IDE.
Then Tomcat takes care the rest. And also try restarting Tomcat.
You can download Jar from :
www.java2s.com/Code/JarDownload/sqlserverjdbc/sqlserverjdbc.jar.zip
android developer