Tomcat Parse Error and Error Matching Patterns

I am getting the following error when I try to go to my application.  
"java.lang.NullPointerException
	at
org.securityfilter.filter.URLPatternMatcher.match(URLPatternMatcher.java:89)
"  if I try to browse to my application.

The Tomcat startup is giving me a parse error as shown in the trace at the
bottom.

I am not sure where to begin debugging.  Suggestions would be greatly
appreciated, as I can't continue development until this is resolved.

---------------------------------

Apr 25, 2003 12:42:57 PM org.apache.commons.modeler.Registry loadRegistry
INFO: Loading registry information
Apr 25, 2003 12:42:57 PM org.apache.commons.modeler.Registry getRegistry
INFO: Creating new Registry instance
Apr 25, 2003 12:42:57 PM org.apache.commons.modeler.Registry getServer
INFO: Creating MBeanServer
Apr 25, 2003 12:42:58 PM org.apache.coyote.http11.Http11Protocol init
INFO: Initializing Coyote HTTP/1.1 on port 8080
Starting service Tomcat-Standalone
Apache Tomcat/4.1.24
mil.army.forscom.menus.securityfilter.SecurityRealm: exampleProperty set to
'it works!'
ERROR Date = 2003-04-25 12:43:05,036 [main]
org.apache.commons.digester.Digester Line = 1434 - Parse Error at line 42
column 25: The content of element type "securityfilter-config" must match
"(security-constraint*,login-config,security-role*,realm+)".
 org.xml.sax.SAXParseException: The content of element type
"securityfilter-config" must match
"(security-constraint*,login-config,security-role*,realm+)".
	at
org.apache.xerces.util.ErrorHandlerWrapper.createSAXParseException(Unknown
Source)
	at org.apache.xerces.util.ErrorHandlerWrapper.error(Unknown Source)
	at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown
Source)
	at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown
Source)
	at
org.apache.xerces.impl.dtd.XMLDTDValidator.handleEndElement(Unknown Source)
	at org.apache.xerces.impl.dtd.XMLDTDValidator.endElement(Unknown
Source)
	at
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanEndElement(Unknown
Source)
	at
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatc
her.dispatch(Unknown Source)
	at
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown
Source)
	at org.apache.xerces.parsers.XML11Configuration.parse(Unknown
Source)
	at org.apache.xerces.parsers.DTDConfiguration.parse(Unknown Source)
	at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
	at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
	at org.apache.commons.digester.Digester.parse(Digester.java:1543)
	at
org.securityfilter.config.SecurityConfig.loadConfig(SecurityConfig.java:276)
	at
org.securityfilter.filter.SecurityFilter.init(SecurityFilter.java:220)
	at
org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilter
Config.java:266)
	at
org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFil
terConfig.java:327)
	at
org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterCon
fig.java:120)
	at
org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:31
58)
	at
org.apache.catalina.core.StandardContext.start(StandardContext.java:3602)
	at
org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1188)
	at
org.apache.catalina.core.StandardHost.start(StandardHost.java:738)
	at
org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1188)
	at
org.apache.catalina.core.StandardEngine.start(StandardEngine.java:347)
	at
org.apache.catalina.core.StandardService.start(StandardService.java:497)
	at
org.apache.catalina.core.StandardServer.start(StandardServer.java:2190)
	at org.apache.catalina.startup.Catalina.start(Catalina.java:512)
	at org.apache.catalina.startup.Catalina.execute(Catalina.java:400)
	at org.apache.catalina.startup.Catalina.process(Catalina.java:180)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39
)
	at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl
.java:25)
	at java.lang.reflect.Method.invoke(Method.java:324)
	at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:203)
invalid regular expression pattern: java.lang.NullPointerException


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