Problem configuring Autoposting (Facebook, LinkedIn, Twitter)

Hi,

After following the instructions provided through these links:

(Facebook) http://stackideas.com/docs/easyblog/administrators/autoposting/setting-up-facebook-autoposting, and checking them several times, I receive the following error page (page link provided)

Not Acceptable!

An appropriate representation of the requested resource could not be found on this server. This error was generated by Mod_Security.

(LinkedIn)
http://stackideas.com/docs/easyblog/administrators/autoposting/setting-up-linkedin-autoposting

404 Component not found Please try one of the following pages: (HOME PAGE)
Note the link to the error page, not the two '/administrator/' in the link:
http://www.myjoomla.com/en-us/administrator/administrator/index.php?option=com_plugins&view=plugin&layout=edit&extension_id=10438

(Twitter)
http://stackideas.com/docs/easyblog/administrators/autoposting/setting-up-twitter-autoposting
Whoa there!
The request token for this page is invalid. It may have already been used, or expired because it is too old. Please go back to the site or application that sent you here and try again; it was probably just a mistake.
Link to the error page: https://twitter.com/oauth/authorize?oauth_token=

Your assistance in solving these issues at your earliest convenience would be greatly appreciated. Thank you in advance.
Best regards,
Angelo.