ofbiz框架下运用birt报表组建问题

用的是birt3.7，链接mysql也ok，在preview下数据和样式都能处的来
放到ofbiz框架下的项目里面后preview也能出的来 但通过url访问就报错
求指点：
页面提示错误：
The following items have errors:Table (id = 9):
- An exception occurred during processing. Please see the following message for details:
Cannot find or process the org.eclipse.birt.report.data.oda.jdbc driver's data source extension configuration.
Cannot find the ODA dataSource extension (org.eclipse.birt.report.data.oda.jdbc).
 Check the workspace log file for any problems with loading the extension bundle and its dependencies.exception.error ( 1 time(s) )
detail : org.eclipse.birt.report.engine.api.EngineException: An exception occurred during processing. Please see the following message for details:
Cannot find or process the org.eclipse.birt.report.data.oda.jdbc driver's data source extension configuration.
Cannot find the ODA dataSource extension (org.eclipse.birt.report.data.oda.jdbc).
 Check the workspace log file for any problems with loading the extension bundle and its dependencies.
at org.eclipse.birt.report.engine.executor.ExecutionContext.addException(ExecutionContext.java:1210)
at org.eclipse.birt.report.engine.executor.ExecutionContext.addException(ExecutionContext.java:1174)
at org.eclipse.birt.report.engine.executor.QueryItemExecutor.executeQuery(QueryItemExecutor.java:96)
at org.eclipse.birt.report.engine.executor.TableItemExecutor.execute(TableItemExecutor.java:62)
at org.eclipse.birt.report.engine.internal.executor.dup.SuppressDuplicateItemExecutor.execute(SuppressDuplicateItemExecutor.java:43)
at org.eclipse.birt.report.engine.internal.executor.wrap.WrappedReportItemExecutor.execute(WrappedReportItemExecutor.后台错误：
Oct 22, 2012 4:42:39 PM org.eclipse.birt.data.engine.odaconsumer.Driver doGetDriverManifest
SEVERE: Cannot find or process the ODA data source extension configuration.
java.lang.IllegalArgumentException: Cannot find the ODA dataSource extension (org.eclipse.birt.report.data.oda.jdbc).
 Check the workspace log file for any problems with loading the extension bundle and its dependencies.
at org.eclipse.datatools.connectivity.oda.util.manifest.ManifestExplorer.getExtensionManifest(ManifestExplorer.java:200)
at org.eclipse.birt.data.engine.odaconsumer.Driver.doGetDriverManifest(Driver.java:147)
at org.eclipse.birt.data.engine.odaconsumer.Driver.findDataSourceExtensionConfig(Driver.java:123)
at org.eclipse.birt.data.engine.odaconsumer.Driver.getDriverExtensionConfig(Driver.java:78)
at org.eclipse.birt.data.engine.odaconsumer.Driver.getExtensionConfig(Driver.java:60)
at org.eclipse.birt.data.engine.odaconsumer.Driver.getDriverHelper(Driver.java:93)
at org.eclipse.birt.data.engine.odaconsumer.DriverManager.getDriverHelper(DriverManager.java:98)