Hopf algebras of dimension pq

Let H be a non-semisimple Hopf algebra with antipode S of dimension pq over an algebraically closed field of characteristic 0 where p q are odd primes. We prove that Tr(S2p)=p2d where d≡pq (mod 4). As a consequence, if p, q are twin primes, then any Hopf algebra of dimension pq is semisimple.