Google Spreadhseet Notification Save button is greyed out

Problems 
- "Set notification rules" save button is not available (grayed out)
- the save button is "grayed" out in Google spreadsheet notification
- save button is also grayed out
- save button in Google spreadsheet notification rules is not worked for me :-(

Solution
1- Just start check the check boxes from end to first (it's worked)
2- Checked all checkboxes and unchecked one of three of top checkboxes
It works for me ;-)