Syntex Error: Range

i'm currently having lots of trouble with VBA's syntex 'cos

statement:

DefaultProb(i) = Application.WorksheetFunction.HLookup _
(Ratings(i), Worksheets("DefaultTable"). _
Range(Cells(2, 2), Cells(RowValue, 20)), RowValue, False)

Specifically, is

Range(Cells(2, 2), Cells(RowValue, 20))

correct? I declared RowValue previously and assigned it to another variable.

Just in case i'm not providing enough information, my whole procedure is:

Sub Default_Probability()
'Generates default probabilities

Dim i As Integer, j As Integer
Dim Tenor(1 To 5) As Integer
Dim Ratings(1 To 5) As String
Dim Row(1 To 5) As Integer
Dim RowValue As Integer
Dim DefaultProb(1 To 5) As Double