Erropage.jsp on Tomcat 5.5

Can someone help me.
I seems simple but I'm searching for a couple hours.
After upgrading to Tomcat 5.5.7 and JDK 1.5.0 cannot catch execeptions in JSP page.
Error : HTTP 500 The page cannot be displayed.
No errors messages in the Tomcat log files.
Where am I wrong ?
The jsp-examples delivered with Tomcat are other.
I guess some problem on compiling errorpage.jsp
The exception is throwed.
When errorPage="dummy.html" then dummy.html is diplayed.
but when errorPage="erropage.jsp" then page cannot been displayed.
The JSP that throws the execption is :
<html>
<body>
<%@ page errorPage="errorpage.jsp" %>
<form method=post action="errhandler.jsp">
What's the coolest programming language in the known universe?<p>
Java<input type=radio name=language value="JAVA" checked>
C++<input type=radio name=language value="CPP">
Visual Basic<input type=radio name=language value="VB">
<p>
<input type=submit>
</form>
<%
if (request.getMethod().equals("POST")) {
if (request.getParameter("language").equals("JAVA")) {
out.println("<hr><font color=red>You got that right!</font>");
} else {
throw new Exception("You chose the wrong language!");
%>
</body>
</html>
The errorpage.jsp is :
<html>
<body>
<%@ page isErrorPage="true" %>
<h1>
Error Page
</h1>
<hr>
<h2>
Received the exception:<br>
<font color=red>
<%= exception.getMessage() %>
</font>
</h2>
</body>
</html>
Thanks,
yds001

Searching at google for some examples, i've found that it works adding this :
<%
out.println("");
%>
I'm a dummy newbie, can someone explain me why it now works ??

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