java.lang.ClassNotFoundException: com.microsoft.jdbc.sqlserver.SQLServerDriver

新手求助！Eclipse中连接sqlserver2000数据库，用maven管理包，出现如下错误
java.lang.ClassNotFoundException: com.microsoft.jdbc.sqlserver.SQLServerDriver
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at Method.getAllData(Method.java:19)
at Method.main(Method.java:77)----------------------------------------------
连接数据库用的是jtds-1.2.[color=#FF0000][/color]-----------------------------------------------
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Vector;

public class Method 
{
  public Vector<Message> getAllData()
  {
  Vector<Message> mes = new Vector<Message>();
  Connection conn = null;
  Statement st = null;
  ResultSet rs = null;
  //1、加载驱动
  try 
  {
Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");
//2、创建连接对象
conn = DriverManager.getConnection("jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=pubs","sa","123");
//3、创建语句执行器
st = conn.createStatement();
String sql = "select id, name, sex from message";
//4、执行数据库操作
rs = st.executeQuery(sql);
while(rs.next())
{
Message m = new Message();
m.setId(rs.getInt(1));
m.setName(rs.getString(2));
m.setSex(rs.getString(3));
mes.add(m);
}
} 
  catch (ClassNotFoundException e) 
  {
// TODO Auto-generated catch block
e.printStackTrace();
} 
  catch (SQLException e) 
  {
// TODO Auto-generated catch block
e.printStackTrace();
}
  finally
  {
  if(st != null)
  {
  try 
  {
st.close();
}
  catch (SQLException e)
  {
// TODO Auto-generated catch block
e.printStackTrace();
}
  }
  if(conn != null)
  {
  try 
  {
conn.close();
} 
  catch (SQLException e) 
  {
// TODO Auto-generated catch block
e.printStackTrace();
}
  }
  }
  return mes;
  }
  public static void main(String[] args)
  {
  System.out.println(new Method().getAllData());
  } 
}

----------------------------------------------------
能帮一下看看什么错误吗？实在是看不出来

------解决方案--------------------
或者jar没对地方