helpwporg on "[Plugin: Better WordPress Google XML Sitemaps (with sitemapindex, multi-site and Google News sitemap support)] 403 forbidden error with wordpress installed on sub folder"

Hello

I am trying to access the http://pelbox.com/sitemapindex.xml file but it is giving me 403 forbidden error. The text version (actual xml only extension changed) of http://pelbox.com/sitemap.txt site works fine and I am able to open the file. I think it is something to do with .htaccess file but I don't know what. Please help me. I am using this plugin to generate site maps

Thanks

http://wordpress.org/extend/plugins/bwp-google-xml-sitemaps/