Problems with hltv

[GAP]

I hope someone will help me .I set HLTV for clan server ,config is fine it records demo. After that i copy demo 9into cstrike folder. Open HL-CS ,console down and viewdemo or playdemo, or i use SK..until now everything is fine. And... message :
"
] playdemo gap
Playing demo from gap.dem.
gap.dem is not a demo file" or


] viewdemo gap
Playing demo from gap.dem.
gap.dem is not a HL demo file.
Viewdemo: couldn't load demo gap.


can some1 help me plissssssssss