Make sure you have that map in your quakelive\baseq3 directory.

Yes, it's on the quakelive\baseq3 directory. I have played other demos on that map and they work, the problem is with this specific demo.

this is the demo im trying to see:

http://trance.gg/Quake-demos/QuakeCon%202013/Quake%20Live%20Duel/qcon2013____grand-map3-SK-rapha(POV)-vs-102evil-lostworld.dm_73

can you guys try and see if it works for you?

I had no problem watching it.

So the maps are there but you can't load them? Could another program have a lock on them or something?

Anyway, I'd recommend trying with wolfcamql.

I checked on the baseq3 directory and the map was not there. So i added it and now the demo loads perfect.
I didn't checked the first time you said because this is a map that I watch demos on all the time, so I knew I had the map. My guess is that the map got deleted when an update was made to quakelive, which is very weird. Well, thanks a lot for the help!!