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Pligg Support

my website url is www.alphaweblistings.com i haven't received any submission from the last more than 10 days ago,,,of putting the site live up!!!
i install many times pligg in my shared host but every time i add link pligg show error , every register with email val dose not work and .... why? is there pligg problem with my host? should i change my host? can i install pligg in shared hosting plan? plz help me.