[Plugin: WordPress Form Manager] Form not validating required fields upon Submit

I REALLY need to resolve this problem. I was able to add the code for the submit button to call the validation JavaScript [fm_submit_onclick(1)] by inserting short code for a form button on the page I in which I inserted the form. Of course all this does is add a second Submit button to the form page. When I click on this button it does validate the required fields but how do I actually change the submit button added automatically by the form manager plug-in??? Yes I am using a custom theme but it really seems like this should be documented somewhere as it’s basic functionality of the form. Please help!!