Which version of the site are you on? I think v2 has a problem with that but things work in v3.
Explorer

V3 'New Chess.com'. v3 at least will display some of my games that I have played, but does not update them as I play new ones.

I'm also on v3 and they're not updating (apparently I've played about 20 games on the site! More like 2000). There are more pressing issues with v3 though - I get pieces jumping to different squares in Live Chess when I click on them twice (I've submitted two bug reports, no answer, my last one was a week ago).
Chess openings explorer does not seem to be updating My games. Will this be up soon?