If you already create Attribute 1. go to Manage Attribute Sets choose "default" You will see Unassigned Attributes at the right hand. drag it to your correct position.
or
2.go to Manage Attributes that you create.
Allow HTML Tags on Frontend = yes
Visible on Product View Page on Front-end = yes <<<< (this one will show your attributes at the front end)
Used in Product Listing = yes
Used for Sorting in Product Listing = yes