steady state criterion not met, solver stopped

I have designed a dual band antenna that resonates at two frequencies in CST microwave studio. It displays the warning 'maximum pulse widths simulated, solver stopped.steady state criterion not satisfied'.
More over when i simulated for freq range 0 to 5 GHz it showed S11 below -10db for both freq and when the freq range was changed to 0 to 3 GHz it showed one S11 below -10db and one above. There is a drasitc difference in my results. What do i do ?please help.

you have first of all to check you mesh criterias

Hello spencer1,
Try to increas number of pulses at the advanced button at T-solver.
Also try to make the Accuracy to -40dB it will converge more to the final and true result.

good luck!
IH