Welcome to the X-Cart forums! Please start by reading the following thread, which will help you get started and hopefully make your experience here a positive one:
http://forum.x-cart.com/showthread.php?t=23970
Please note that this link is not an answer to your question, but we need you to update your signature with your X-Cart version so that we can answer your questions correctly.
If you are using 4.1.x, you should go into your Summary/Tools menu and use the 'clear template cache' option - your old skin is most likely cached.