Question: How can I use solve for equations with multi variable in this point?

Hello guys...

please help me to solve these equation.I have some equation with some boundary condition.

Why can't I have good results for it?
q3:=-0.1080877976e-1:
q2:=0.04351279185:
q1:=-0.7037638761e-1:
q0:=0.05575044494:
c:=3:

eq := q3*m^6+q2*m^4+q1*m^2+q0;
rishe := solve(eq = 0, m);
a := 1/(2*c); rho := a/`#msub(mi("t"),mn("1"))`;
f0 := evalf(cosh(abs(rishe[1])*xi));
f1 := evalf(cosh(abs(Re(rishe[3]))*xi)*cos(abs(Im(rishe[3]))*xi));
f2 := evalf(sinh(abs(Re(rishe[3]))*xi)*sin(abs(Im(rishe[3]))*xi));
pin := C0*k0*f0+C1*f1+C2*f2;
ppin := diff(pin, xi); pis := C0*f0+(k1*C1+C2*k2)*f1+(C2*k1-k2*C1)*f2;
pin1 := evalf(subs(xi = a, pin));
pin2 := evalf(subs(xi = -a, pin));
pin3 := evalf(subs(xi = a, ppin));
pin4 := evalf(subs(xi = -a, ppin));
pis1 := evalf(subs(xi = a, pis));
pis2 := evalf(subs(xi = -a, pis));
hal := solve({pin1 = sigma01xx, pin2 = sigma01xx, pin3 = 0, pin4 = 0, pis1 = sigma01xy, pis2 = sigma01xy}, {C0, C1, C2, k0, k1, k2});
how can I have a good result with this method?
please help me to solve this multi equations multi variable.