Url Rewrite Configuration file size

<p>Hello, we are using configuration files called from our web.config file as follows: &nbsp;&lt;rewrite&gt; &nbsp;&nbsp;&nbsp;&nbsp;</p> <p>&lt;rules configSource=&quot;InboundRules.config&quot; /&gt; &nbsp;&lt;outboundRules configSource=&quot;OutboundRules.config&quot; /&gt; &nbsp;&lt;/rewrite&gt;.</p> <p>This all works well. There are 4 inbound rules per subsite, when we reach about 500 rules we get the dreaded 500 server error. As soon as we remove some of the rules, it starts working again. Is there a limit on the number of rules? or the size of the file size or load time for the xml file (could it be timing out or something)? btw, we have tested each set of rules separately and they work, it's the combination that seems to break the file.</p> <p>&nbsp;</p> <p>thank you so much for your help.</p> Also, we are running in 64-bit mode, and we get the following error when we try to view the rules in iis7 management console: "Cannot read the confguration file because it exceeds the maximum file size" I thought that using the include as above, would get us around the file restriction? I searched the server registry for the key MaxWebConfigFileSizeInKB, and it does not exist on the server.