※ 필수입력정보 ※

▷ 제품버젼 : nWmail (JAVA 웹메일)

▷ 사용중인 주소(URL) : http://
▷ 문제발생시 메뉴/주소 :
▷ 문제발생시 에러메세지
: Error: 500
Location: /source/user/mail_user/mail_user_form_insert.jsp
Internal Servlet Error:

javax.servlet.ServletException: org.gjt.mm.mysql.PreparedStatement$EndPoint
at org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:459)
at source.user.mail_0005fuser._0002fsource_0002fuser_0002fmail_0005fuser_0002fmail_0005fuser_0005fform_0005finsert_0002ejspmail_0005fuser_0005fform_0005finsert_jsp_0._jspService(_0002fsource_0002fuser_0002fmail_0005fuser_0002fmail_0005fuser_0005fform_0005finsert_0002ejspmail_0005fuser_0005fform_0005finsert_jsp_0.java:1473)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:119)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.jasper.servlet.JspServlet$JspCountedServlet.service(JspServlet.java:130)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.java:282)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:429)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:500)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.tomcat.core.ServletWrapper.doService(ServletWrapper.java:405)
at org.apache.tomcat.core.Handler.service(Handler.java:287)
at org.apache.tomcat.core.ServletWrapper.service(ServletWrapper.java:372)
at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:812)
at org.apache.tomcat.core.ContextManager.service(ContextManager.java:758)
at org.apache.tomcat.service.http.HttpConnectionHandler.processConnection(HttpConnectionHandler.java:213)
at org.apache.tomcat.service.TcpWorkerThread.runIt(PoolTcpEndpoint.java:416)
at org.apache.tomcat.util.ThreadPool$ControlRunnable.run(ThreadPool.java:501)
at java.lang.Thread.run(Thread.java:479)

Root cause:
java.lang.ClassCastException: org.gjt.mm.mysql.PreparedStatement$EndPoint
at org.gjt.mm.mysql.PreparedStatement.(Unknown Source)
at org.gjt.mm.mysql.jdbc2.PreparedStatement.(Unknown Source)
at org.gjt.mm.mysql.jdbc2.Connection.prepareStatement(Unknown Source)
at org.gjt.mm.mysql.jdbc2.Connection.prepareStatement(Unknown Source)
at user.table.MailUser.insert(MailUser.java:1448)
at source.user.mail_0005fuser._0002fsource_0002fuser_0002fmail_0005fuser_0002fmail_0005fuser_0005fform_0005finsert_0002ejspmail_0005fuser_0005fform_0005finsert_jsp_0._jspService(_0002fsource_0002fuser_0002fmail_0005fuser_0002fmail_0005fuser_0005fform_0005finsert_0002ejspmail_0005fuser_0005fform_0005finsert_jsp_0.java:601)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:119)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.jasper.servlet.JspServlet$JspCountedServlet.service(JspServlet.java:130)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.java:282)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:429)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:500)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.tomcat.core.ServletWrapper.doService(ServletWrapper.java:405)
at org.apache.tomcat.core.Handler.service(Handler.java:287)
at org.apache.tomcat.core.ServletWrapper.service(ServletWrapper.java:372)
at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:812)
at org.apache.tomcat.core.ContextManager.service(ContextManager.java:758)
at org.apache.tomcat.service.http.HttpConnectionHandler.processConnection(HttpConnectionHandler.java:213)
at org.apache.tomcat.service.TcpWorkerThread.runIt(PoolTcpEndpoint.java:416)
at org.apache.tomcat.util.ThreadPool$ControlRunnable.run(ThreadPool.java:501)
at java.lang.Thread.run(Thread.java:479)

▷ 질문내용
: 왜 이런거죠?
웹으로 접속후 첫 사용자 등록을 하려고 하는데
모든 내용을 기입하고 회원가입 버튼을 누르고 최종 확인 하니까 이런 메시지가 나옵니 다.
부탁 드립니다.