[sPlOrYgOn]

I'm trying to make a dll to run a server command when the server changes map (in ServerActivate like PMB said so)
but it keeps giving me:

Error, Bad server command exec cstrike/de_aztec.cfg

and Here is the code.

void ServerActivate( edict_t *pEdictList, int edictCount, int clientMax )
{
   char server_cmd[256];
   sprintf (server_cmd, "exec cstrike/%s.cfg", STRING (gpGlobals->mapname));
   SERVER_COMMAND (server_cmd);
   (*other_gFunctionTable.pfnServerActivate)(pEdictList, edictCount, clientMax);
}

I've been trying different things but I don't know much
so anyone know how to do this the right way?