ClassCastException on WebLogic 6.1?

I'm trying to deploy a web application using securityfilter. I'm using
WebLogic 6.1 sp3 and I've implemented my own real extending
SimpleSecurityRealmBase.

When I test my app I can log on but right after it passes the login page
(both booleanAuthenticate and isUserInRole return true) I receive the
following error:

16-jun-03 14:51:59 CEST> <Error> <HTTP>
<[WebAppServletContext(667005,cargohandling,/cargohandling)] Servlet failed
with Exception
ava.lang.ClassCastException:
org.securityfilter.filter.SecurityRequestWrapper
       at jsp_servlet._www._term.__index._jspService(__index.java:118)
       at weblogic.servlet.jsp.JspBase.service(JspBase.java:27)
       at
weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java
:265)
       at
weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java
:304)
       at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:21)
       at
weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)
       at
org.securityfilter.filter.SecurityFilter.doFilter(SecurityFilter.java:199)
       at
weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)
       at
weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletCo
ntext.java:2464)
       at
weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java
:2039)
       at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:139)
       at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)

Any insights on what's happening here?

Thanx in advance.

-- Dan


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