grouplist skinshortcuts onup action

I have a problem with the onup behaviour. The situation is like so:
A grouplist with skinshrtcuts widgets. I want to have specific onup conditions. The problem ist, that e.g. the <onup>300</onup> isn't working in the skinshortcuts widgets. It does nothing and i don't know, why


Grouplist 

<control type="grouplist" id="301">

    <height>770</height>

    <orientation>vertical</orientation>

    <bottom>188</bottom>

    <width>2385</width>               

    <scrolltime tween="quadratic">400</scrolltime>

    <usecontrolcoords>true</usecontrolcoords>

    <itemgap>0</itemgap>



    <!-- Widget 1 -->                     

    <include>skinshortcuts-template-widget-vertical.1</include>                       

    <!-- Widget 2 -->

    <include>skinshortcuts-template-widget-vertical.2</include>     

    <!-- Widget 3 -->

    <include>skinshortcuts-template-widget-vertical.3</include>   

    [....]               

</control> 

Widget 1

<other include="widget-vertical.1">

    <property name="id" tag="mainmenuid" />

    [...]     

    <controls>            

        <control type="group" id="301$SKINSHORTCUTS[id]21"> 

            <control type="grouplist">                    

                [...]              

            </control>

        </control>  

        <control type="$SKINSHORTCUTS[widgetlisttype]" id="301$SKINSHORTCUTS[id]1">

            <onup>300</onup>                

            <visible>Integer.IsGreater(Container(301$SKINSHORTCUTS[id]1).NumItems,0) | Container(301$SKINSHORTCUTS[id]1).IsUpdating</visible>

            <skinshortcuts>visibility</skinshortcuts>                  

            <include content="TemplateItemLayout">

                 <param name="shortcutsid" value="301$SKINSHORTCUTS[id]1" />

           </include>

           <include content="TemplateFocusLayout">

                 <param name="shortcutsid" value="301$SKINSHORTCUTS[id]1" />

           </include>

           <content limit="$VAR[DefWidgetLimit]" target="$SKINSHORTCUTS[target]" sortby="$SKINSHORTCUTS[sortby]" sortorder="$SKINSHORTCUTS[sort]">$SKINSHORTCUTS[content]</content>

        </control>

    </controls>

</other>

Can someone help?