Thanks for the feedback.
I tried the Respone.Clear and I get an error box that says:
Excel found unreadable content in 'ReceiptOrderForm.xlsx'. Do you want to recover the contents of the workbook. If you trust the source of this workbook, click yes.
I said yes and it opened it up correctly.
I also ran it and did save instead of open and I got the above message, and when I opened it, Excel repaired the file, but did not give me any information on what it reparied.
I am using Excel 2010, it that makes any difference.