Hi, I am trying to implement the backgrounds.cm fix for outlook but i cannot get it to work on windows desktop app (2007, 2010, 2013, 2016)

what am I missing?? PLEASE HELP

my code:

<!-- HEADER-->
<table class="outer-row" border="0" cellpadding="0" cellspacing="0">
<tr>
<td class="" align="center" bgcolor="#34a29b">
<table class="row" border="0" cellpadding="0" cellspacing="0">
<tr>
<!-- COL -->
<td class="header-bg-image" align="right" background="http://mw.weaver.ch/upload/145/VPS-TEST/img/grid-green-square.png" bgcolor="#34a29b" width="307" valign="top">
<!--[if gte mso 9]>
<v:rect xmlns:v="urn:schemas-microsoft-com:vml" fill="true" stroke="false" style="mso-width-percent:1000;">
<v:fill type="tile" src="http://mw.weaver.ch/upload/145/VPS-TEST/img/grid-green-square.png" color="#34a29b" />
<v:textbox inset="0,0,0,0">
<![endif]-->
<div>
<table>
<tr>
<td class="header-content col-12 pad-top-50 pad-bottom-0 pad-top-sm-30 pad-left-20 pad-right-20 pad-right-sm-20 pad-left-sm-20 pad-bottom-sm-0" valign="top" align="left">
<table bgcolor="#ffffff" border="0" cellpadding="0" cellspacing="0" style="width: 100%;">
<tbody>
<tr>
<td class="pad-left-50 pad-right-50 pad-top-20 pad-bottom-0 pad-left-sm-20 pad-right-sm-20">
<table class="headerText">
<tr>
<td class="ms-bold greeting pad-bottom-10" valign="middle" align="left" width="262">
Sehr geehrte Damen und Herren
</td>
</tr>
<tr>
<td class="text pad-bottom-20">
Wir freuen uns, Ihnen heute eine unserer Schullungen näher vorzustellen:
</td>
</tr>
<tr>
<td class="green-title pad-bottom-16">
In Form – informiert
</td>
</tr>
<tr>
<td class="large-date pad-bottom-0 pad-bottom-sm-20">
25./26. September 2018 in Brunnen
</td>
</tr>
</table>
</td>
</tr>

</tbody>
</table>
</td>
</tr>
</table>
</div>
<!--[if gte mso 9]>
/v:textbox
/v:rect
<![endif]-->
</td>
<!-- END COL -->
</tr>
</table>
</td>
</tr>
</table>
<!-- END BLOCK -->