[General] Task Manager not working

[Matt]

Right, it's what I thought then, your host is disabling access to it, so you'll need to ask them. Who do you host with?

[dineshkummar]

why it is not allowing to change permissions for task.php file ???????? Any Idea guys.......

[Matt]

Because of the reason I just gave you above, your host is disabling access to it. Often on free hosts, when they detect a script is using "too many resources", they force the permissions to 000 and stop you changing them.