Woking have failed in their appeal against the red card Marvin Morgan received at Torquay last week.
Torquay boss Paul Buckle also felt Morgan was unlucky but the striker will now have to serve a three-match ban.
Meanwhile, Woking boss Frank Gray insists he does not feel under pressure despite seeing his side go eight league and cup matches without a victory.
"There's half a season to go, lots to play for. We're working hard to put it right," he told the club's website.