your code is fine except that you are
not comparing Progress field to String,
just enclosed it in Double Quote.
this, and with the rest of the code
that test Progress:
If Me.Progress = Completed Then
...
...
should be:
If Me.Progress = "Completed" Then
...
...
also, on the last part of the code:
Me.dataTickedOff.Enabled = False
should be:
Me.dataTickedOff = False
not comparing Progress field to String,
just enclosed it in Double Quote.
this, and with the rest of the code
that test Progress:
If Me.Progress = Completed Then
...
...
should be:
If Me.Progress = "Completed" Then
...
...
also, on the last part of the code:
Me.dataTickedOff.Enabled = False
should be:
Me.dataTickedOff = False