Question: ODE system

When I solve the equation

ode := diff(y(x), x, x) = t*y(x)+1

with

dsolve(ode)

everything is ok,

y(x) = exp(sqrt(t)*x)*_C2+exp(-sqrt(t)*x)*_C1-1/t

However, when I want to solve the system

sysode := (D(G[1]))(s) = T[1](s), (D(G[2]))(s) = T[2](s), (D(G[3]))(s) = T[3](s), (D(T[1]))(s) = kappa*N[1](s), (D(T[2]))(s) = kappa*N[2](s), (D(T[3]))(s) = kappa*N[3](s), (D(N[1]))(s) = -kappa*T[1](s)+tau*B[1](s), (D(N[2]))(s) = -kappa*T[2](s)+tau*B[2](s), (D(N[3]))(s) = -kappa*T[3](s)+tau*B[3](s), (D(B[1]))(s) = -tau*N[1](s), (D(B[2]))(s) = -tau*N[2](s), (D(B[3]))(s) = -tau*N[3](s)

 dsolve(sysode)

I obtain an error message

Error, (in ODEtools/info) found wrong extra arguments: {(D(B[1]))(s) = -tau*N[1](s), (D(B[2]))(s) = -tau*N[2](s), (D(N[3]))(s) = -kappa*T[3](s)+tau*B[3](s), (D(N[2]))(s) = -kappa*T[2](s)+tau*B[2](s), (D(N[1]))(s) = -kappa*T[1](s)+tau*B[1](s), (D(B[3]))(s) = -tau*N[3](s), (D(G[2]))(s) = T[2](s), (D(G[3]))(s) = T[3](s), (D(T[1]))(s) = kappa*N[1](s), (D(T[2]))(s) = kappa*N[2](s), (D(T[3]))(s) = kappa*N[3](s)}

What's happened?

                                     Sandor