After trying several forms extensions, even commercial ones unsuccessfully, I decided to give ArtForms a try, and I don't regret. This is a great extension that allowed me to create a form without any complication. It produces a very clean front end interface and intuitive error massage when a required field is left blank.

I do have to admit that at first when submitting the form, I will get a blank page instead of a thank you page. However, I found a fix for it in the below post.

http://forum.joomla.org/viewtopic.php?f=471&t=361856&p=1598335#p1598335

Overall it's a great extension!

Thanks,