Thank you for your quick reply but your tipp didn't help. I made a (dirty)
trick to get this page in the list: I copied the index.html from another
directory an edited it by hand. After the next run of winhttrack the page was
on the list of available sites. 
I know that this is not "beautiful" but I think for the 3 pages I have this
problem this solution is easier for me than border you with this any longer
;-)

Many thank. I wish you a happy (and hopefully successfull) new year.

regards viktor