two If statement not working

[penfold1992]

I am trying to get some logic to work.

If a cell has I entered, the cell MUST have another sectioned entered in order to write to the database,

If (strDataType = "I") And (IsNull(cmbPASCode.Value) = False) Then
If UpdateFlag <> False Then
    UpdateFlag = False
    MsgBox ("If the data is incoming, you must set a value for PAS Code")
    End If
End If

I have tried this but it doesnt seem to work...
i dont really know why it doesnt work but im wondering if anyone can see my mistake.

EDIT:
my mistake is obvious...IsNull(cmbPASCode.Value) = False...
this should be set to true. i feel like a fool for posting this

 

[John Big Booty]

... but it did help you spot your error so all was not wasted