so long as your admin entry looks like
STEAM_0:1:5301001 ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789 /=XDC=Alzir
best bets to grab your steam id in game as sometimes it needs to start steam_0:0 or steam_0:1 and only the game HLSW app seems to know what one to use.
other thing is making sure beetlesmod is on the latest version, its up to beta .45 now so thats worth a stab
also worth noting that if your admin has ! listed with the letters and numbers you cant use admin until the full admins are gone and its only sub admins left, but it doesnt sound like thats the case?