This plugin is not supported on hosts where allow_url_fopen and imap_open() is disabled. NetworkSolutions is unfortunate one of those hosts. It gives us no way to collect the new incoming emails.
This issue has been noticed by users of other plugins as well:
http://stackoverflow.com/questions/8599463/retrieving-pop3-with-php-on-a-shared-server-that-doesnt-allow-imap-open
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