Erro toncat

Front-end
#1

Galera estou usando o netbeans e ao starta-lo ele da o seguinte erro

GRAVE: Error filterStart
22/06/2011 20:52:31 org.apache.catalina.core.StandardContext start
GRAVE: Context [/modular] startup failed due to previous errors
22/06/2011 20:52:31 org.apache.catalina.loader.WebappClassLoader clearReferencesJdbc
GRAVE: A web application registered the JBDC driver [org.apache.derby.jdbc.ClientDriver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered.
22/06/2011 20:52:31 org.apache.catalina.startup.HostConfig deployDirectory

alguem pode me ajudar?

#2

se ja tentou subir o tomcat por fora da IDE pra ver se da o mesmo erro ? se der, ja achou o erro.

#3