URL Rewrite IIS Module leading to Home Page Error

Hi guys (‘n’ gals)

I’ve used this rule for a few sites (changing the domain of course) and while it works perfectly for tidying up my URLs on one site, on two others it leads to the homepage / leading to a 404, whereas /index.php works perfectly.

Can anyone tell me how to prevent the rule from messing up the homepage?

<rewrite>
<rules>
<rule name=”Main Rule” 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>

Many thanks

Ali