WordPress permalinks error 404 on IIS

i have enable permalinks on my wordpress site and now every page returns 404 error. The site is hosted in IIS 8.5

the web.config file has the following rule inside

<?xml version="1.0" encoding="UTF-8"?>

<directoryBrowse enabled="false"/>
<rewrite>
  <rules>
  <clear/>
        <rule name="wordpress" stopProcessing="true">

      <match url=".*" />

      <conditions logicalGrouping="MatchAll">

        <add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" />

        <add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true" />

      </conditions>

      <action type="Rewrite" url="index.php" />

    </rule>
</rules>
</rewrite>

what can i do to fix that and make permalinks work?