Unable to load spring form tags

Sorry for the misleading title, the original problem has been solved.

I am having some problems with the jar and par exporter in the ui.

1. I can't export a war.
2. The exporter automatically creates the WEB-INF/classes folder under which all the content of a war is placed. dm Server, on the other hand, looks at <classpath>/META-INF for MANIFEST.MF which is now under <classpath>/WEB-INF/classes/META-INF; therefore, the file is not found. Right now, I have to manually edit the structure of a par file in order to deploy it. I also tried to include Bundle-ClassPath: WEB-INF/classes in MANIFEST, but dm Server didn't behave differently. An inconvenient consequence is that I can't debug the server.