Animal, have you any other tips to propose to me ? I don't know how to figure it out.
Actually, I add logs in the firebug console and saw that the jsonData associated to the reader of my store is not updated with the servlet response to my request.
1. Some people actually assign a different store to a grid after it has been created. Hopefully, you don't do that?
2. Do you get an 'exception' event when you reload the store? (try adding an exception listener)