when authorization, error message "couldn't connect to host"

When i authorize the FB account, i received this message, at the end it says an error “couldn’t connect to host”

Could you please help? Many thanks

The full message is below

-=

Array
(
[doFB] => 1
[nName] => Gol
[fbAppID] => 468260876630472
[fbAppSec] => acfa1215fea70a5cc777e600bbef5990
[catSelEd] =>
[fbPostType] => A
[fbAttch] => 1
[fbAttchAsVid] => 0
[imgUpl] => 1
[fbMsgFormat] => New post (%TITLE%) has been published on %SITENAME%
[fbMsgAFrmt] =>
[useFBGURLInfo] => 1
[riComments] => 0
[riCommentsAA] => 0
[rpstOn] => 0
[rpstDays] => 0
[rpstHrs] => 2
[rpstMins] => 0
[rpstRndMins] => 15
[rpstPostIncl] => 0
[rpstType] => 2
[rpstTimeType] => A
[rpstFromTime] =>
[rpstToTime] =>
[rpstOLDays] => 30
[rpstNWDays] => 365
[nxsCPTSeld] => a:1:{i:0;s:4:”post”;}
[rpstBtwDays] => Array
(
)

[fbURL] => https://www.facebook.com/gol.gol.7587
[fbPgID] => gol.gol.7587
)

WP_Error Object
(
[errors] => Array
(
[http_request_failed] => Array
(
[0] => couldn’t connect to host
)

)

[error_data] => Array
(
)

)

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