I'm sorry but I'm not at my computer right now so I can't really look at YaST, but as nice as it is I would actually recommend using
Webmin to set up an apache server since it gives you the ability to change just about any option in your conf files of the /etc/apache(2) folder whereas the YaST will just give you basic setup options.
When I get to my computer I take a look at YaST and see if I can see what could cause your issue but I would definitely recommend Webmin.