JADE framework and JSTL breaks!

[filbert]

I'm developing in WSAD using the EAD4J JADE framework. We are trying to install the JSP Standard Tag Library (JSTL). I downloaded Standard 1.03 from Jakarta and copied all the jar files into my webApplication/WEB-INF/lib directory.
When I go into WSAD, refresh from local, rebuild and start the server, the application dies. I can still get to the entry page which is just HTML but as soon as I try to log in, my login servlet dies and gives a ClassCastException (see below)
Anyone out there ever worked with JADE and had a similar problem? Could there be naming conflicts? I've tried going through debug, but i don't have access to the source code that is throwing the exception. Are they just plain incompatible? We don't appear to have the JADE tag libs installed so I don't know why there would be a conflict. Here's my exception.
java.lang.ClassCastException: com.ibm.ejs.cm.JDBC1PhaseRF at com.ibm.rmi.javax.rmi.PortableRemoteObject.narrow(PortableRemoteObject.java:253) at javax.rmi.PortableRemoteObject.narrow(PortableRemoteObject.java:136) at com.ibm.ead4j.topaz.common.jdbc.DatabaseContextWASImpl.getDataSource(DatabaseContextWASImpl.java:106) at com.ibm.ead4j.topaz.common.jdbc.DatabaseContextWASImpl.getConnectionFromPool(DatabaseContextWASImpl.java:177) at com.ibm.ead4j.topaz.common.jdbc.DatabaseContextWASImpl.getConnectionFromPool(DatabaseContextWASImpl.java:154) at com.ibm.ead4j.topaz.common.jdbc.DatabaseContext.getConnection(DatabaseContext.java:138) at com.ibm.ead4j.topaz.persistence.jdbc.TransactionContext_jdbc.getConnection(TransactionContext_jdbc.java:174) at com.ibm.ead4j.topaz.persistence.TransactionContextManager.getConnection(TransactionContextManager.java:62) at com.toyota.tmmna.skpi.domain.jdbc.AffiliateFactory_jdbc.getAffiliateMap(AffiliateFactory_jdbc.java:240) at
any help would be appreciated.