How to clear activities filter?

Please i need your help, i have a project with activities which has been limited its view instead for 2 years to 120 days. I cleared all the filters in the activities but still is doesnt allow me to see the remaining activities and i can see only the wbs headres without any details or dates shown.how can i view the whole project?and the finish date is not editable to open the range of period and see the whole project.no filters assigned?any idea?is it that it was worked from another pc locally installed the project and when i open it from my laptop l;ocally installed the primavera again i cannot take away that filter...?thank a alot