AJAX Toolkit Tabs

Is this the intended effect withthe tab control

I notice that each time i roll over a tab (other than the front active one) it makes a call to the server

TIA

i noticed exactly the same thing...

a tab (other than the front active one) it makes a call to the server...

even with the simple code below...

<ajaxToolkit:TabContainer runat="server" ID="TabContainer2">

<ajaxToolkit:TabPanel runat="server" ID="TabPanel4" HeaderText="TabPanel1">
<ContentTemplate>
TabPanel1
</ContentTemplate>
</ajaxToolkit:TabPanel>

<ajaxToolkit:TabPanel runat="server" ID="TabPanel5" HeaderText="TabPanel2" Enabled="true">
<ContentTemplate>
TabPanel2
</ContentTemplate>
</ajaxToolkit:TabPanel>

<ajaxToolkit:TabPanel runat="server" ID="TabPanel6" HeaderText="TabPanel3">
<ContentTemplate>
TabPanel3
</ContentTemplate>
</ajaxToolkit:TabPanel>
</ajaxToolkit:TabContainer>

i noticed it makes call to server...