WP- Link Exchange plugin – problem with mod_rewrite and .htaccess

Hi,

i have a problem with that plugin and i saw that this problem also affects official plugin page:

The plugin can be downloaded from here:
http://www.ebrandmarketing.com.au/wordpress-link-directory/

The problem is easy, after installation, i setup the plugin for use seo friendly URL, all apparently work good, but the google bot can’t access to directory link:

Example: my blog is in the root of the website, i put the directory in a subfolder named “directory”

The google bot doesn’t find http://www.myweb.com/diretory/ and return a 404 Error. And also don’t work the categories links http://www.myweb.com/diretory/categories/cat-name

After few time i found that the error is generated by a mistake in .htaccess file.

My wordpress .htaccess is the default
My link directory .htaccess is:

RewriteEngine on

RewriteRule ^categories/(.*)/(.*)$ index.php?cat=$1&page=$2 [QSA,L]
RewriteRule ^subcategories/(.*)/(.*)/(.*)$ index.php?cat=$1&scat=$2&page=$3 [QSA,L]

Ok this is a big problem, because i have installed a SEO diretory and if the search engine can’t accethe directory that is not exacltly a seo fliendly directory. The big problem is that this is not only a my problem but is a BUG of the plugin.

You can try what i say by using this tool:
http://tool.motoricerca.info/spam-detector/index.pcgi

Try that on author plugin directory
http://www.ebrandmarketing.com.au/directory/

The error message will be : ERROR: Page not found.

But the page exist and is working…

Please help me to fix the problem
Thanks