Copy row to next available row in another wb

Hello,

I am trying to copy row to next available row in another wookbook. I have the follow codes, but not sure why it skips 3 rows every time, then the new data to be copied on the workbook.

Dim nxtRw As Integer

'Determine next empty row in log.xls
nxtRw = Workbooks("Tooling Master Sheet.xlsx").Sheets("Sheet1").Range("C" & Rows.Count).End(xlUp).Row + 1
'Copy Activeworkbook row to to log.xls
With ws
Set rngToCopy = .Range("C6", "N25")
End With

With rngToCopy
Set rngToPaste = wkb.Sheets("Sheet1").Range("C4").Rows(nxtRw).Resize(.Rows.Count, .Columns.Count)

End With

rngToPaste.Value = rngToCopy.Value
Application.CutCopyMode = False


Please help! Thank you!!