How can I add hyperlinked text or image to home page greeting text?

As admin, I am modifying the greeting text on family page.  I want to add clickable link to another location (facebook), but when I try to insert HTML code (with HTTP address, image, text) all I get on preview and/or final home page is HTML code showing, not a 'link'. 

I tried adding this... (I've removed my facebook name...) 

<A href="http://www.facebook.com/xxxxx"><IMG border=0 width=32 height=32 src="http://slangcath.files.wordpress.com/2007/10/facebook.jpg"></A>