there is another file which is called : hibernate.cgf.xml under cfg folder

you need to map your hbm files from there  for example :

<mapping resource="hbm/assignment/Assignment.hbm.xml" />

you can also see the source code inside hibernate.cgf.xml and see how the mapping works

KateDehbashi wrote:

If the hbm2dll ant doesn't create the database statement for a particlar table in the csns.dll file, what could be the problem?

I've created a test class under csns.model just to find out if the hbm2dll works fine but it doesnt seem to create any new tables.

First of all, as Sanaz said, check if you added the mapping to hibernate.cfg.xml.

Secondly, do not post source code files - it's considered cheating.