@Cyber
As Patmonster said, it's a pre-steampipe demo that can't be played with the current version of CSS.

Steam forums sticky on demos and updates
http://forums.steampowered.com/forum....php?t=1379315

TLDR version - every steam update that makes changes to game/engine will either render older demos unplayable or cause visual problems if they do play.

Apparently Valve tried to increase resilience of client/server data table mismatches so that older demos might still be able to be played, albeit with visual issues, but it wasn't enough. I find that different demos fail to play for different reasons.

"No matching RecvTable for SendTable" suggests to me that a file/table is missing client-side rather than server-side, and I presume that a majority of the missing files preventing demos from playing aren't actually missing--they've just been moved into different directories (e.g. "custom" vs yourname) so copying the files back might help... I haven't tried it myself and this is pure speculation, so take this idea with a grain of salt!