When editing table cells to insert links to pdf files and load the pdf files, the image/link dialog box comes up and prevents me from loading pdf files as detailed below:

• The link dialog box appears after I press the link button.
• I press the browse server button
  • Whether using firefox or IE this brings up the image/file browser dialog box.
  • The image/file dialog box has limiting file associations and image sizes.
• I browse the pdf file I want to link to the Robert Brown text and hit the upload file button.
  • I get the error message:  Only Images with .jpg .gif and .png extensions are allowed.