I can't seem to get environments to work in blogger

Only $….$ work.

I do have environments turned on:

In my blogger template I have

<head>

…..

…..

<script src='http://arielbalter.com/jsMath/easy/load.js' type='text/javascript'/>

</head>

Here is the html source of the three posts. I tried all sorts of things…

mathtest

$\sqrt{\sigma}$

$\begin{equation}\sqrt{\sigma}\end{equation}$

\begin{equation}\sqrt{\sigma}\end{equation}

math test 2

Math test 2

$\sqrt(\sigma)$

\\begin{equation}

\sqrt(\sigma)

\\end{equation}

\begin{equation}

\sqrt(\sigma)

\end{equation}

mathtest 3

<div>

\begin{equation}

\sqrt{\sigma}

\end{equation}

</div>

Thanks in advance for any help!