help can't access activities (tasks views bug)

help can't access activities (tasks views bug)

i've created a new view with a contact criteria since then each time i click on the activities tab it opens the same page inside the previous tab endlessly (see screenshot attached), i can't access my views of my activities, also in the setup you can manage views for every tabs/objects but not for activities (tasks and events)...

i tried in firefox, IE 6&7, and on different computers...

what can i do beside crying???
do i need to start a new zoho CRM or is there a way to fix it???

PLEASE HELP i have some info to access, and only by the report and the search function it's really not easy...

see screenshot attached