checkout validation problem

Hi, I install your plugin and find a problem on checkout page. I use Arg multistep checkout, customer need to be input the customer detail before enable to go to next step. but after install your plugin, the validation doesn’t apply anymore. they can go to next step without enter any info, like name, email. It was require to enter before going to next step, but not any more after your plugin. Any fix for this? I need customer to enter customer detail before they are able to next step. Thank you.