How to a signal into Wavelet Toolbox for analysis?

I have a simulink model that outputs a voltage and current signals. How can I import these V & I signals into Wavelet Toolbox for analysis? I tried to run the simulink model, then go to Wavelet Toolbox, select file >> Import from Workspace >> Import a signal, but the V & I signals are not listed in the menu. May be because they are complex phasors? Can anyone find out this issue ...