Alt text not showing up when hovering over images

I have a text widget in my sidebar and have set up images and links to facebook, youtube, etc. None of my ‘alt’ tags are working in firefox, chrome or ie.

[please read http://codex.wordpress.org/Forum_Welcome#Posting_Code and mark any posted code accordingly – codes posted without backticks or the code button will get corrupted]

Here is the code: <p><img src=”http://www.kricklewoodfarm.com/images/buttons/facebook_square.jpg&#8221; border=”0″ alt=”Kricklewood Farm on Facebook”>
<img src=”http://www.kricklewoodfarm.com/images/buttons/youtube_square.jpg&#8221; border=”0″ alt=”Kricklewood Farm Videos on Youtube”>
<img src=”http://www.kricklewoodfarm.com/images/buttons/picassa_square.jpg&#8221; border=”0″ alt=”Kricklewood Farm photo albums at Picassa”>

<img src=”http://www.kricklewoodfarm.com/images/buttons/icontact.jpg&#8221; border=”0″ alt=”Newsletter Signup”>
</p>

I did a search on this and got references to a plugin which hasn’t been updated for 2 years so thought I would start anew.

Thanks!

Dale