XBMC not working after update

My fav XBMC I most watch movie with files. Now connect internet by LAN, then update automatic, and installed then but not run when screen "relax, XBMC will resume shortly" every boot run, I clicked ESC then username and password, pi and raspberry so done for set where live, exit, same run repeat each other no starting XBMC, I did sudo apt-get update then sudo apt-get install xbmc but screen said this is not instillation, like damage package, not sure what to do, how fix?

Wasn't still working. Just formatted and then re-installed wheezy-raspbian and XBMC, they are new versions both, its better working now, more powerful than old versions.
I have WIFI Adapter USB, how setup WIFI for XBMC?