Is Cadence unable to simulate AC to DC converters using simple full bridge rectifier?
It looks to me like you need to use the "earth" symbol somewhere so that 0 volts is defined. At the moment there doesn't appear to be an earth on your circuit but that might be because you've cut-off the picture. Hopefully it's as simple as adding an earth node (as what is required in most simulators).

Try adding it at the junction of the two smoothing caps (1 uF). You might also want to explain why the diodes are "N4007" types instead of "1N4007".