From online pics it looks like one of those soft, squishy, beach cruiser types of saddles... If this is the case, that's probably your problem. Those types of saddles let your 'sit bones' sink into the padding and then your tender parts are rubbing against the saddle surface, which is causing your pain. A more firm saddle might not seem like it'd be as comfy, but because you're supported by your sit bones instead of soft flesh, they are more comfortable.