CP serach module not display after search finsihed

CP Serach module is not displayed after search is finsihed and the search results are displaed while it was diplayed without any problem in Joomla 1.5.
CP Search module is allocated to the menu item and displayed before search operation starts.
I am wondering if it is a bug of CP or Joomla 2.5 or any parameter of CP Search module is missing.
I would appreciate any help in advance.

This solution applies:

solidsystem.it/forum/8-cp-20-for-j1617-p...t-is-shown.html#1399