accessibility for low or no vision

[cwins]

I have to tell you I love SMF and recommend it to all of my clients, but I did run into a problem today that I don't know how to handle.
I have made a website for the Mountain State Council Of The Blind.  There is a button that when clicked does read the letter in the graphic, but the screen readers can't read the button. 
For now, I am having them send me an email and I am registering them into the forum. Once in they can read posts and respond without a problem.
Is there any way that when one hovers over the graphic the letter could be read out loud?

CWinslow
for hxxp:www.mscbwv.org/community [nonactive]

[karlbenson]

Click the Link "Listen to the letters" and it will read them out.

[Orstio]

You're going to run into quite a few accessibility issues on that registration page:

http://checker.atrc.utoronto.ca/servlet/Checkacc;jsessionid=D965379D0FB73C47D9A2DDC70AA7DAD1?file=http%3A%2F%2Fmscbwv.org%2Fcommunity%2Findex.php%3Faction%3Dregister&submit1=Check+It

As you reduce those errors, the screen readers will have an easier time.