Can't connect to a current Time Machine backup disk
I bought the latest version of Time Capsule with 2TB disk, but used it as the wireless router primarily. I was able to move some pictures from my Windows PC to its HDD and can browse the pictures via my Macbook Air. I just tried to setup the Time Machine 1st time, and found it out the "Can't connect to a current Time Machine backup disk" message after I tried to click the Time Machine from the launch pad. I could not find the discussion of the same topic and would like to get help quickly. Thanks a lot.
MacBook Air, OS X Mavericks (10.9)