Q: why is my apple stored doesn't work?

Hello, damerjr. 

Thank you for visiting Apple Support Communities. 

Sometimes simply closing and restarting the applications and power cycling the Mac can resolve the issue.  However, ere are a couple troubleshooting articles that I would recommend going through when experiencing this issue.  Also, if you have any privacy or security software installed, make sure to disable them and attempt accessing the Mac App Store again. 

Troubleshooting the Mac App Store

http://support.apple.com/kb/TS3624

Can't connect to the iTunes Store

http://support.apple.com/kb/ts1368

Cheers,

Jason H.