Hide title when calling form from template

I’m trying to call the plugin from a template, so I put
‘<?php theme_my_login(); ?>’ which works fine, but I want to get rid of the title “Log In” at the top. I read the list of parameters, but I’m not sure how to use them correctly. What’s the correct syntax to set show_title to false?
Thanks

http://ww.wp.xz.cn/plugins/theme-my-login/