MDB Unhandled exception error...help needed

Hi all,

I've been getting the following error when running mdb postprocess:

[  Error ] Unhandled exeption
[  Error ] Exception.Message: Object reference not set to an instance of an object.

The only thing I chaged was adding to mdb.config the following lines that I took from my rex.config (where they worked fine):

<title>'title'</title>
<desc>{'category(, )'. }{Actors: 'actor(, )'. }{Presenter: 'presenter(, )'. }'description'</desc>
<credits></credits>

I understood that mdb uses the rex postprocess and thought this would work out.

Can somebody give me any guidance here.

Thanks a lot.