Search Button in IH01/IH03 Not active

Hi Experts,

In E.C.C 6.0 version i find that the search button in IH01/IH03 -Structure display appears as Grayed and is inactive.

I think my changing the parameter PM_TREE_INACTIVE = X in Parameter settings for a user, it can be made active.But my question is how to get the same active for all the users as a default or is it possible to make this setting globally applicable instead of user specific.

Fast response will be appreciated.

Thanks

Manish