Question: pde with boundary and initial conditions.

Hi...

I need to solve the pde 

eq := diff(diff(V(y, t), y, y)-alpha^2*V(y, t), t) = -I*alpha*U(y)*(diff(V(y, t), y, y)-alpha^2*V(y, t))-I*alpha*(diff(U(y), y, y))*V(y, t)-(diff(V(y, t), y, y))+alpha^2*V(y, t)

with U(y) as a known function

and boundary conditions as

bcs := {V(-1, t) = 0, V(1, t) = 0, (D[1](V))(-1, t) = 0, (D[1](V))(1, t) = 0}

and initial condition as

V(y,0)=phi(y);

both of phi(y) and U(y) can be taken as some simple function like U(y)=phi(y)=y;

when I tried to solve it I got this problem. Plz can anyone help me ? I need to do it as quickly as possible

Error, (in pdsolve/sys) too many arguments; some or all of the following are wrong: [[V(y, t)], {V(-1, t) = 0, V(1, t) = 0, (D[1](V))(-1, t) = 0, (D[1](V))(1, t) = 0}]