If you are not able to use the smiley features of the new site you need to go to your general settings and near the bottom you will see Miscellaneous Options.
The first option is ** message editor interface**
You need to choose ** Enhanced Interface Full WYSIWYG Editing.
Then scroll down and hit save settings at the bottom of the page.
Once you do that your post reply box will have emoticons (smileys) on the top and side.