Unable to initialize Struts ActionServlet IllegalAccessError

[DuhDuhDuh]

Hello,

Tomcat 5.5.9 is obtaining the following error on startup during the deplyment of the test.war:

INFO: Deploying web application archive test.war
Apr 10, 2006 10:26:12 AM org.apache.struts.action.ActionServlet init
SEVERE: Unable to initialize Struts ActionServlet due to an unexpected exception or error thrown, so marking the servlet as unavailable. Most likely, this is due to an incorrect or missing library dependency.
java.lang.IllegalAccessError: tried to access method org.apache.xerces.impl.xs.SchemaGrammar.<init>()V from class org.apache.xerces.impl.xs.SchemaGrammar$BuiltinSchemaGrammar
at org.apache.xerces.impl.xs.SchemaGrammar$BuiltinSchemaGrammar.<init>(SchemaGrammar.java)
at org.apache.xerces.impl.xs.SchemaGrammar.<clinit>(SchemaGrammar.java:629)
at org.apache.xerces.impl.xs.XMLSchemaValidator.finit$(XMLSchemaValidator.java:1112)
at org.apache.xerces.impl.xs.XMLSchemaValidator.<init>(XMLSchemaValidator.java)
at org.apache.xerces.parsers.StandardParserConfiguration.configurePipeline(StandardParserConfiguration.java:275)
at org.apache.xerces.parsers.DTDConfiguration.reset(DTDConfiguration.java:629)
at org.apache.xerces.parsers.DTDConfiguration.parse(DTDConfiguration.java:502)
at org.apache.xerces.parsers.DTDConfiguration.parse(DTDConfiguration.java:585)
at org.apache.xerces.parsers.XMLParser.parse(XMLParser.java:152)
at org.apache.xerces.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1142)
at org.apache.commons.digester.Digester.parse(Digester.java:1572)
at org.apache.struts.action.ActionServlet.parseModuleConfigFile(ActionServlet.java:738)
at org.apache.struts.action.ActionServlet.initModuleConfig(ActionServlet.java:687)
at org.apache.struts.action.ActionServlet.init(ActionServlet.java:333)
at javax.servlet.GenericServlet.init(GenericServlet.java:211)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1091)
at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:925)

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Any ideas on how I can determine this error's cause? Thanks in advance,

Newbie Tomcat User.