Forms :: Selecting Multiple Check Boxes

I have a form that has three checkboxes (IDDocument, DrivingLicence and Certification) on it. What the form is looking to do is based on the selection it will open a scanned document of the requested documents. There are 5 permutations that could be selected (either first on only, second one only, third one only, first and second and first and third). How do I code the IF Statement this so that the system will look at the different options and then do certain things accordingly.The code I have at the moment is:

Public Sub ProcessRequest_Click()
Dim Form1 As String
Dim Form2 As String
Path = "Staff" & Me!EmployeeName & ""
If Me!IDDocument = True And Me!DrivingLicence = False And Me!Certification = False Then

Do one thing

ElseIf Me!IDDocument = False And Me!DrivingLicence = True And Me!Certification = False Then

Do a second thing

ElseIf Me!IDDocument = False And Me!DrivingLicence = False And Me!Certification = True Then

Do a thrid thing

ElseIf Me!IDDocument = True And Me!DrivingLicence = True And Me!Certification = False Then

Do a forth thing

ElseIf Me!IDDocument = True And Me!DrivingLicence = False And Me!Certification = True Then

Do a final thing

End If
End Sub

All the bits work (the form stuff) but my IF statements are not working. It seems that access is seeing the checkboxes as null and so the IF is not working when i check box 1 and leave the other two unchecked.