The cumulative rating error in the local microdata business scheme

I have a plugin named RS. This plugin will generate a scheme for a local business with an aggregate rating and reviews. But the problem is that star ratng is not displayed in the rich fragment. I recently discovered that there is an error in the Structured Data Testing Tool in my schema generated by RS certificate plugins.

here is a sample code of my schema, you can also check this at http://www.google.com/webmasters/tools/richsnippets .

<div itemscope="" itemtype="http://schema.org/LocalBusiness">
    <p class="testimonial">
    </p>
    <div itemprop="reviews" itemscope="" itemtype="http://schema.org/Review">
        <div itemprop="reviewRating" itemscope="" itemtype="http://schema.org/Rating">
            <meta itemprop="ratingValue" content="5">
            <img src="http://olathe.addictionrecoverycenterks.com/wp-content/plugins/RSTestimonials/i/images/olathe-rehab-star-5.png"
            border="0" align="absmiddle" style="decoration:none;">
        </div>
        <span itemprop="name">
            <strong>
                Finally successful!
            </strong>
        </span>
        <br>
        <span itemprop="description">
            Finally successful! This was not my first try at treatment, but it is
            the only one that worked. Addiction Recovery Center Olathe, KS has an excellent
            rehabilitation program, and if you work it you are going to get clean and
            sober!
        </span>
        <br>
        —
        <strong>
            <span itemprop="author">
                Clarckson
            </span>
        </strong>
        <em>
            , Olathe
        </em>
        <meta itemprop="datePublished" content="2013-06-14">
        Jun 14, 2013
    </div>

    <span itemprop="name">
        Addiction Recovery Center Olathe KS
    </span>
    is rated
    <span itemprop="aggregateRating" itemscope="" itemtype="http://schema.org/AggregateRating">
        <span itemprop="ratingValue">
            5
        </span>
        /5 based on
        <span itemprop="reviewCount">
            5
        </span>
        reviews.
    </span>
</div>

This is the error message I received in the testing tool

Error: If the invoice is listed in the overview summary, the page should contain reviews. Otherwise, you can use voices. Additional information about general viewing.