Tumblr error

Hi,
when trying to make an auto-posting or also to hit the button on the site http://s-katic.com (tumblr blog is http://stanaholical.tumblr.com/) I got this

TumblrOAuth Object
(
    [http_code] =>
    [url] =>
    [host] => http://api.tumblr.com/v2/
    [timeout] => 30
    [connecttimeout] => 30
    [ssl_verifypeer] =>
    [format] => json
    [decode_json] => 1
    [http_info] =>
    [useragent] => Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; WOW64; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; InfoPath.3; .NET4.0E; .NET CLR 1.1.4322)
    [sha1_method] => nsx_trOAuthSignatureMethod_HMAC_SHA1 Object
        (
        )

    [consumer] => nsx_trOAuthConsumer Object
        (
            [key] => QSckWtKcXetjSY4aAJmYjEJ1phQFzsRwMR2v8rb6F2kpqWb4zT
            [secret] => WwbUNDPFpt8JRLBdC4mvxuIlyPcrfg4kBak6Nrf5q3SixzJEQK
            [callback_url] =>
        )

    [token] =>
)

Warning: curl_exec() has been disabled for security reasons in /home/skatic/public_html/wp/wp-content/plugins/social-networks-auto-poster-facebook-twitter-g/inc-cl/apis/trOAuth.php on line 241
####

Array
(
)

NOTE: the latest three posts I made them manually to keep it updated but it stopped working before those just posted.
I also created a new app from tumblr but still get the error.
I am not sure if it is something my hosting should do or I should.

Thanks.

http://wordpress.org/extend/plugins/social-networks-auto-poster-facebook-twitter-g/