IF ... (AND) statement run time error "13"

I need help with my if statements. In the code show below: The first if ... then section works just as intended, however the second section creates a run time error "13". Can someone please explain me how to fix this issue? / what i'm doing wrong?

Sub ASN_BaaN3()
Dim i As Integer
i = 0

ThisWorkbook.Sheets("BaaN").Activate

Do While ThisWorkbook.Sheets("BaaN").Cells(2 + i, 1) <> ""

    'CHECK NON SERIALIZED
    If Range("J" & 2 + i).Value = "N" Then
        Range("P" & 2 + i).Value = "Ok, Non Serialized"
        Range("P" & 2 + i).EntireRow.Interior.Color = RGB(198, 239, 206)
    End If

    If Range("J" & 2 + i).Value = "Y" And _
    Range("M" & 2 + i).Value = "ACK" And _
    Range("o" & 2 + i).Value = "TRUE" Then
        Range("P" & 2 + i).Value = "Ok, Non Serialized"
        Range("P" & 2 + i).EntireRow.Interior.Color = RGB(198, 239, 206)
    End If

    i = i + 1
Loop

End Sub

when typing the code like this i get the same error:

    If Range("J" & 2 + i).Value = "Y" Then
    If Range("M" & 2 + i).Value = "ACK" Then
    If Range("O" & 2 + i).Value = "TRUE" Then
        Range("P" & 2 + i).Value = "Ok, Non Serialized"
        Range("P" & 2 + i).EntireRow.Interior.Color = RGB(198, 239, 206)
    End If
    End If
    End If

Also when typing the code like this

    If Range("J" & 2 + i).Value = "Y" Then
    If Range("M" & 2 + i).Value = "Y" Then

Please help!