No output for Tab "most_viewed"

Hi. Just added a new tab for most viewed products. But I get no output in the frontend for mode "most_viewed".

Static Block (for identifyer tab-hsws-02)

Code:

{{block type="joomlart_jmproducts/list" name="home.jmproducts.list" title="" mode="most_viewed" catsid="38,79,76,77,78" height="160" quanlity="8" width="160" perrow="4"}}

Manage Pages:

Code:

{{block type="joomlart_jmproducts/list" name="home.jmproducts.list" }}

Page Layout:

Code:

<reference name="mass-top">

	<block type="joomlart_jmslideshow/list" name="jmslideshow" />

	<block type="joomlart_jmproductsslider/list" name="jmproductsslider" />

</reference>

<reference name="content-top">

	<block type="joomlart_jmtabs/core" name="jmtabs">

		<action method="addTabs_staticblock">

			<title>Meist verkaufte</title>

			<identifier>tab-hsws-01</identifier>

		</action>

		<action method="addTabs_staticblock">

			<title>Meist angeschaute</title>

			<identifier>tab-hsws-02</identifier>

		</action>

		<action method="addTabs_staticblock">

			<title>Neu hinzugef