Sql – Grails OC4J trouble deploying to 10.1.3.1

I've got a Grails app that's deployed successfully on a stand-alone OC4J instance, but when I try and deploy it to the full version via the GUI I get this problem:

[Nov 5, 2009 10:50:41 AM] Binding diploma-1.0.1 web-module for application diploma to site default-web-site under context root diploma
[Nov 5, 2009 10:50:48 AM] Operation failed with error: Error creating bean with name 'messageSource': Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'transactionManager': Cannot resolve reference to bean 'sessionFactory' while setting bean property 'sessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory': Cannot resolve reference to bean 'hibernateProperties' while setting bean property 'hibernateProperties'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'hibernateProperties': Cannot resolve reference to bean 'dialectDetector' while setting bean property 'properties' with key [hibernate.dialect]; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dialectDetector': Invocation of init method failed; nested exception is org.springframework.jdbc.support.MetaDataAccessException: Could not get Connection for extracting meta data; nested exception is org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (The database is already in use by another process: org.hsqldb.persist.NIOLockFile@882e422e[file =D:\product\10.1.3.1\OracleAS_1\j2ee\home\prodDb.lck, exists=true, locked=false, valid=false, fl =null]: java.lang.Exception: java.io.IOException: The process cannot access the file because another process has locked a portion of the file : D:\product\10.1.3.1\OracleAS_1\j2ee\home\prodDb.lck)

Does anyone have a clue about what my problem might be?