In some situations standard New, Edit, Save, Delete and other buttons must be overridden for Activities. This will not affect your other users’ functionality who are not using Advologix.
Setup Event Button Overrides
Navigate to the Buttons and Links section of Events.
Edit the View, New Event, & Edit Buttons
Set to Applicable Visualforce Page
Upon Completion...
Setup Task Button Overrides
Navigate to the Buttons and Links section of Tasks.