Changing Resource Store

Hi,

I have found problems while changing a resource class. 
Here is a case:
 * create a resource.
 * insert the resource using jigadm
 * resource works fine
 * change the resource class adding fields and methods
   (no field related with the [_strange_] jigsaw serialization).
 * restart server
 * try to access the resource from jigadm or http:
   - fails
   - cannot delete the resource anymore.
  
It seems that the resource store messes up with everything
if I change the resource class.

What could I do about that?
I would like to change or replace the default resource store 
of jigsaw to prevent/correct this kind of problem. 


Daniel.