how come i get forbidden on all urls

i used custom footprint of mine scraped very well

this is one of the links
http://www.indianapsychiatricsociety.org...nline.html

how come i cannot post track backs on them ?
i tired using
http://www.anomy.net/pingbuddy/en/

get 404 ?
please help

if i get forbidden in 1 site then all other similar platfoms with similar page gives forbidden for a while how come , how is all sites connected ?