Problem with legends for multiple entries

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Hello everyone, I am plotting different entities on the figure window. The problem is when i use the legend function, it doesn't work and give me an error. All the plot function works fine as shown in the figure. The way i am doing it is like this,

[axuser,ayuser]=userdistribution();
figure(1);
hold on;
h(1)=plot(axuser,ayuser,'yo','MarkerSize',3,'MarkerFaceColor',[0.5,0.5,0.5],'DisplayName','Users');
%Layout the ABSs in the coverage area using square topology
[absx,absy]=abslayout();
h(2)=plot(absx,absy,'rh','MarkerSize',10,'MarkerFaceColor',[1,0,0],'DisplayName','ABSs');
%Layout the CABSs in the coverage area.
[cabsx,cabsy]=cabslayout();
h(3)=plot(cabsx,cabsy,'k*','MarkerSize',10,'MarkerFaceColor',[0,0,1],'DisplayName','RBSs');
%Layout the HBSs in the coverage area.
[hbsx,hbsy]=hbslayout();
h(4)=plot(hbsx,hbsy,'b^','MarkerSize',12,'MarkerFaceColor',[0.2,0.2,1],'DisplayName','HBSs');
legend(h);