I understand. Your plugin works fine until I install the Custom My Account plugin. They don’t really like each other. Yours still continues to function fine, it just breaks the other one. Since I’m already committed to it, I’ll work it out with the developers.
Maybe you can contact the developers directly and work this issue out. Here’s their demo page:
http://phoeniixx.com/demo/woocommerce/custom-my-account/my-account/
Yes, I can confirm that once I disable Awesome Support all functionality is restored. I’m not sure what screen shots will add to the problem description. Just go to the plugin section, click Add New and then select More Details. Instead of the pop-up description you’ll get a full page. As for the plug-in, all I can show is some tabs that once you click on them, they don’t extend.