Error message during test.

Hi, thanks for nice plugin.
I clicked “Submit Test Post to Twitter” button to test it and it showed an error message. Here is the error message below.

Array
(
[pgID] =>
[isPosted] => 0
[pDate] => 2014-08-09 23:14:58
[Error] => Resp: {“request”:”\/1.1\/statuses\/update.json”,”error”:”Read-only application cannot POST.”}| Error: | MSG: Test Post from Smart Forums – 75
)

Array ( [pgID] => [isPosted] => 0 [pDate] => 2014-08-09 23:14:58 [Error] => Resp: {“request”:”\/1.1\/statuses\/update.json”,”error”:”Read-only application cannot POST.”}| Error: | MSG: Test Post from Smart Forums – 75 )

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