I'm having a problem using the Mailer taglib to send email from a JSP page. When i first load it, I get the following exception: Unhandled error! You might want to consider having an error page to report such errors more gracefully java.lang.NoClassDefFoundError: javax/naming/NamingException at java.lang.ClassLoader.resolveClass0(Native Method) at java.lang.ClassLoader.resolveClass(ClassLoader.java, Compiled Code) at org.apache.tomcat.loader.AdaptiveClassLoader.loadSystemClass(AdaptiveClassLo ader.java, Compiled Code) at org.apache.tomcat.loader.AdaptiveClassLoader.loadClass(AdaptiveClassLoader.j ava, Compiled Code) at org.apache.tomcat.loader.AdaptiveServletLoader.loadClass(AdaptiveServletLoad er.java, Compiled Code) at org.apache.jasper.runtime.JspLoader.loadClass(JspLoader.java, Compiled Code) at java.lang.ClassLoader.loadClass(ClassLoader.java, Compiled Code) at org.apache.jasper.compiler.TagBeginGenerator.init(TagBeginGenerator.java, Compiled Code) at org.apache.jasper.compiler.JspParseEventListener$GeneratorWrapper.init(JspPa rseEventListener.java, Compiled Code) at org.apache.jasper.compiler.JspParseEventListener.addGenerator(JspParseEventL istener.java, Compiled Code) at org.apache.jasper.compiler.JspParseEventListener.handleTagBegin(JspParseEven tListener.java, Compiled Code) at org.apache.jasper.compiler.DelegatingListener.handleTagBegin(DelegatingListe ner.java, Compiled Code) at org.apache.jasper.compiler.Parser$Tag.accept(Parser.java, Compiled Code) at org.apache.jasper.compiler.Parser.parse(Parser.java, Compiled Code) at org.apache.jasper.compiler.Parser.parse(Parser.java, Compiled Code) at org.apache.jasper.compiler.Parser.parse(Parser.java, Compiled Code) at org.apache.jasper.compiler.Compiler.compile(Compiler.java, Compiled Code) at org.apache.jasper.runtime.JspServlet.loadJSP(JspServlet.java, Compiled Code) at org.apache.jasper.runtime.JspServlet$JspServletWrapper.loadIfNecessary(JspSe rvlet.java, Compiled Code) at org.apache.jasper.runtime.JspServlet$JspServletWrapper.service(JspServlet.ja va, Compiled Code) at org.apache.jasper.runtime.JspServlet.serviceJspFile(JspServlet.java, Compiled Code) at org.apache.jasper.runtime.JspServlet.service(JspServlet.java, Compiled Code) at javax.servlet.http.HttpServlet.service(HttpServlet.java, Compiled Code) at org.apache.tomcat.core.ServletWrapper.handleRequest(ServletWrapper.java, Compiled Code) at org.apache.tomcat.core.ContextManager.service(ContextManager.java, Compiled Code) at org.apache.tomcat.service.http.HttpConnectionHandler.processConnection(HttpC onnectionHandler.java, Compiled Code) at org.apache.tomcat.service.TcpConnectionThread.run(SimpleTcpEndpoint.java, Compiled Code) at java.lang.Thread.run(Thread.java, Compiled Code) However, if I reload the page it works fine and is able to use the tags to send the message. Anybody know what could be causing this? Thanks, Laura