Problems with PDF Merge

It appears that my Merge software has intermittent problems, sometimes it works than it does not work I have attached the two documents I am trying to merge and a screen dump of the error message that I receive What appears to be the problem??

========================================

I have tried following command line, it does work, can you work fine by following command line in your system?

"C:\Program Files\VeryPDF PDF Split-Merge v3.0\pdfpg.exe" "D:\temp5\Marriage Cert - Incorrect pg 2.pdf" "D:\temp5\Marriage Cert - Incorrect.pdf" D:\temp5\out.pdf

VeryPDF

========================================

I have contacted you on numerous occasions (first time 18 Jun 11) in regards to a problem I have with your product.

I have attached a PowerPoint showing were the problem is

As I have mentioned prior, I purchased your product and expect it to function correctly, I do not with to use DOS commands.

What is wrong with the product you sold me??

Can you phone me and walk me through the process if I am doing it wrong?

========================================

We apologize for any inconvenience this may have caused to you, you can drag&drop the PDF files from Windows Explorer to PDF Split-Merge’s Window, you can use drag&drop method to instead of Click “Add” button, we hoping drag&drop operation will work fine to you, please to try.

VeryPDF

========================================

Drag & Drop worked - thanks

Why am I having problems with the 'Add' function??

========================================

Maybe there has a limitation in "Add" button, we will research the problem in 'Add Button' function shortly, we will let you know after this problem issolved, thanks for your patience.

VeryPDF