Using Offset Loop To Write Form Data Onto Closed Workbook

I'm trying to use an offset loop to write form data onto a closed workbook. It works fine when the sheet is blank but as soon as I fil the first row it sticks when running. I'm not getting any error in the code and am at a bit of a loss.

Here's what I'm using:

Do
If IsEmpty(ActiveCel) = False Then
ActiveCell.Offset(1, 0).Select
End If
Loop Until IsEmpty(ActiveCell) = True
ActiveCell.Value = txtName.Value

[Code] .........