You have selected a filter which has desactivated the capture of the selected link.   

By marking the option "Use the filename extension as MIME-Type Filter" in the folder Capture | Properties | File Types.
 
MemoWeb uses the extension included in the URL to determine the associated MIME-Type.

This link is inactive because of:

• The MIME Type must not be captured (see Menu "File Types").
• The extension is missing or is unknown and is not linked to any type known.