constraint in fmincon

Hi,

In my function optimization fmincon, I use 600 inequalities nonlineairs and one nonlineair equality, but the solution does not satisfact bounds. my constraint function writes like this:

function [c,ceq] = nonlcon(x)
    global n

          for i=n+1:2*n

          c(i)= abs(-100-sum(x(n+1:i)-0.075266*abs(x(n+1:i))))-600;
          end

          ceq=  sum (x(n+1:2*n)-0.075266*abs(x(n+1:2*n)));
  end

is it right ????