  In order to show how stringent the restrictions posed on analytical solutions
of quasi-exactly solvable potentials are, we construct analytical solutions for
the Razavy type potential V(x) = Vo (sinh**4(x)-k sinh**2(x) ) based on the
polynomial solutions of the related Confluent Heun Equation, where the free
parameter k allows to tune energy eigenvalues, a desirable feature in different
theories. However, we show that with the described method, the energy
eigenvalues found diverge when k (goes to) -1, a feature caused solely by the
procedure.
