Hihassan_ammar,
Thank you for you query.
I am sorry, but to get your issue more exposure, I would suggest posting it in the commercial forums, since this is a commercial product. You can do this at Commercial Forum/Notebook - HP ProBook, EliteBook, Compaq, Slate/Tablet PC, Armada, LTE.
In the mean time here is a link to get you to the home page for your unit. HP Probook 450, You will need to select the correct model and follow the links.
I hope this helps.