Adapt Web.Config to .htaccess

I need to keep two sites in the same hosting (one I've developed, let's call site 01) and another one which is a Wordpress created by the old company that served the client (We call site 02).

The directory structure looks like this:

• / common (My new site)
• / en (My new site)
• / en (My new site)
• / es (My new site)
• / site02 (Wordpress)
• .htaccess (My new site)
• index.php (My new site)
• web.config (Wordpress)

Web.config causes my site to stop working when entering some internal page. When removing the web.config and leaving the htaccess, who to is the site02. I tried to move web.config into the / site02 directory, but it still did not work. It gives you some infinite looping errors.

I do not know what else to do.

My root HTACCESS:

<IfModule mod_rewrite.c>
    RewriteEngine On
    RewriteRule ^(common|sistema|upload|tubosapolo)($|/) - [L]
    RewriteRule !\.(css|js|xml|bmp|swf|flv|ico|html|pdf|woff|ttf|svg|eot|zip|mp3|jpg|png|gif|jpeg|ai|eps|ico)$ index.php [L]
</IfModule>

The web.config content of the root:

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<system.webServer>
    <httpErrors errorMode="Custom">
        <remove statusCode="404" subStatusCode="-1" />
        <error statusCode="404" prefixLanguageFilePath="" path="/tubosapolo/index.php" responseMode="ExecuteURL" />
    </httpErrors>
    <rewrite>
        <rules>
            <rule name="Tubos Apolo" stopProcessing="true">
                <match url=".*" />
                <conditions>
                    <add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" />
                    <add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true" />
                </conditions>
                <action type="Rewrite" url="index.php{R:0}" />
            </rule>
        </rules>
    </rewrite>
</system.webServer>

If I remove my htaccess, site02 works. But my internal pages from site01 all go to site40's 404. This I do not understand!

Can anyone help me?