Trying to download this site:

<http://water4gas.com/online-books/>

Despite setting +water4gas.com/+*.gif +*.jpg +*.png +*.tif +*.bmp - and "get
non-html links" checked (links tab).  

All I'm getting is .html.  And its not following into the folders below the
main folder despite having the mirroring depth set to 5 and external depth at
0.  Then I started downloading folder-by-folder.  While it was working, I
could see some files being added to one folder.  When it finished, they were
gone.  

I've been at this for two hours.  Can anyone please provide some suggestions
or an example of the proper settings for this job.

Thank you,

Paul