system settings does not allow changes to be made to object

Hi,

In one of my test system, when i tried to change the object its displaying following error message.

System settings does not allow changes to made to the object.

I have checked the settings in se03, regarding modification objects of software components and namespace those are in state of modifiable for this namespace object.

I would like to know, how to change the object in the namespace.

Regards

Srikanth