first clear this ,its a wireless router and you are using it as a wireless access point [because actual wireless access point are actually just that and more expensive, a good one is anyway ]
this part i don't under stand !!quote-- and it connects to the router via wireless network adapter
how can it hook to the main router wirelessy ,it has to be hardwired from what i have read about this over the years,im no expert in networking ,and also you need to go into its settings and set it to be used as a wireless access point i thing i did on my belkin any way .
as seen in image 2 here they added a d-link wireless access point and you see it is hardwired to the linksys router .
http://www.google.ca/imgres?imgurl=http://bcognizance.iiita.ac.in/jan-mar07/t5_files/image003.jpg&imgrefurl=http://bcognizance.iiita.ac.in/jan-mar07/t5.htm&h=507&w=366&sz=22&tbnid=Jo15hC51xii2VM:&tbnh=131&tbnw=95&prev=/images%3Fq%3Dwireless%2Baccess%2Bpoint&usg=__m2gcSNUmAgfiXkVtjlQZdR1avqo=&ei=7l9IS6SdKMahlAe1s7UF&sa=X&oi=image_result&resnum=5&ct=image&ved=0CB4Q9QEwBA