When i am deploy the servlet class file in tomcat server i get the following errors pe Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

javax.servlet.ServletException: Error instantiating servlet class InsertServlet org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298) org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859) org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588) org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489) java.lang.Thread.run(Unknown Source) root cause

java.lang.InstantiationException sun.reflect.InstantiationExceptionConstructorAccessorImpl.newInstance(Unknown Source) java.lang.reflect.Constructor.newInstance(Unknown Source) java.lang.Class.newInstance0(Unknown Source) java.lang.Class.newInstance(Unknown Source) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298) org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859) org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588) org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489) java.lang.Thread.run(Unknown Source) note The full stack trace of the root cause is available in the Apache Tomcat/6.0.32 logs.

Apache Tomcat/6.0.32

my servlet code is: import java.io.*; import java.lang.*; import java.sql.*; import javax.servlet.*; import javax.servlet.http.*;

public abstract class InsertServlet extends HttpServlet{ public void doPost(HttpServletRequest req,HttpServletResponse res) throws ServletException,IOException { res.setContentType("text/html"); int count=0; PrintWriter out = res.getWriter(); String FirstName=req.getParameter("FirstName"); String LastName=req.getParameter("LastName"); String Email=req.getParameter("Email"); String Password=req.getParameter("Password"); String ConformPassword=req.getParameter("ConformPassword"); String Dateofbirth=req.getParameter("Dateofbirth"); int Age=Integer.parseInt(req.getParameter("Age")); String Gender=req.getParameter("Gender"); String Address=req.getParameter("Address"); String Country=req.getParameter("Country"); String State=req.getParameter("State"); String City=req.getParameter("City"); int Telephone=Integer.parseInt(req.getParameter("Telephone")); int Mobile=Integer.parseInt(req.getParameter("Mobile")); String Howdidyouhear=req.getParameter("Howdidyouhear");

PreparedStatement pstm=null;

try{ Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver "); String connectionUrl = ("jdbc:sqlserver://localhost:1433;database=sree;integratedSecurity=true"); Connection con = DriverManager.getConnection(connectionUrl); pstm=con.prepareStatement("insert into stureg(?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)"); pstm.setString(1,FirstName); pstm.setString(2,LastName); pstm.setString(3,Email); pstm.setString(4,Password); pstm.setString(5,ConformPassword); pstm.setString(6,Dateofbirth); pstm.setInt(7,Age); pstm.setString(8,Gender); pstm.setString(9,Address); pstm.setString(10,Country); pstm.setString(11,State); pstm.setString(12,City); pstm.setInt(13,Telephone); pstm.setInt(14,Mobile); pstm.setString(15,Howdidyouhear); int i=pstm.executeUpdate(); if(i==1){ System.out.print("insert"); }
else{ System.out.print("not insert"); } } catch(Exception e){ e.getMessage(); } } } plz help me to solve this problem