在线等个ＪＡＶＡ　和ＳＱＬ２０００　不通过连接池的问题？
我的程序；
import   java.sql.*;

public   class   sqllink
{
public   static   void   main   (String[]   args )   throws   ClassNotFoundException,   SQLException
{
Class.forName( "com.microsoft.jdbc.sqlserver.SQLServerDriver ");
String   str   = "jdbc:microsoft:sqlserver://192.168.50.60:1433;DatabaseName=student ";
String   user   =   "sa ";
String   pass   =   "software ";
Connection   conn   =   DriverManager.getConnection(str,user,pass);
Statement   stmt   =   conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);
String   sql   =   "select   *   from   student ";
ResultSet   rs   =   stmt.executeQuery(sql);
while(rs.next())
{
System.out.print(rs.getString(0));
System.out.print(rs.getString(1));
System.out.print(rs.getString(2));
}
rs.close();
stmt.close();
conn.close();
}
}编译后有个错误：
Exception   in   thread   "main "   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.ClassLoader.loadClassInternal(Unknown   Source)
at   java.lang.Class.forName0(Native   Method)
at   java.lang.Class.forName(Unknown   Source)
at   wangsong.data.sqllink.main(sqllink.java:9)
我想估计是驱动的问题，但是我把msbase.jar，mssqlserver.jar，msutil.jar加到ＬＩＢ　下还是这个错误，希望高手指教～

------解决方案--------------------
在环境变量lib下添加详细的包路径
比如“你以前的lib参数”;d:\j2sdk1.4.1_01\lib\mssqlserver.jar;
------解决方案--------------------
再环境变量中+；D:\j2sdk1.4.1_01\lib\msbase.jar；D:\j2sdk1.4.1_01\lib\mssqlserver.jar；D:\j2sdk1.4.1_01\lib\msutil.jar
------解决方案--------------------
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