Hello,   
I had a friend's laptop here to do cleanup maintenance for her.  No problem at all logging into my D-link. When she came to pick it up, I deleted the information in HER networking folder to clear any access to my D-link.  
A week or so later she came back here to learn something I had showed her and she was confused. 
Ok, we opened HER laptop and could see my network SSID and I typed in the password. It says "enabled' but from that point it simply  says authenticating when trying to bring up a web page.  It has an excellent signal strength etc. etc.   
I think it is something I did on her laptop when I deleted the original connection??   There are many other wireless networks around me (condo) and many are not secure.  

   In the end, I just grabbed an unsecured one but I would like her to be able to get back on my network because she will be returning to learn more about the web and email. 
I run D-link 655 
                  wired to my desktop (without a hitch)
                  wireless to my own laptop 
                  wireless HP photosmart 
                  Ooma Voip 
                  Windows 7 on both of my computers
 She is running XP on her laptop
Thank you for any help with this.   Donna