AntiBot Captcha not working in 1.6.2 version

Question

I have installed AntiBot Captcha and it is not showing the Image of the captca. My version is 1.6.2. Could somebody help

Comments

At least a warning should be displayed if something goes wrong in the processing..... (?)

Are you checking the right error_log file ? :-)

just to be sure, if you check on the phpinfo.php, the entry :
"error_log"
has a value or not ?

in your php.ini what's your error level ?
Check that it's for example :
error_reporting = E_ALL

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Just as a test, if in your directory :
qa-plugin/q2a-captcha-antibot-master/

you rename the file "gothic.otf" to "__gothic.otf"

do you see something on the error file ?

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Yes ,
Error :
PHP Warning:  imagettftext() [<a href='function.imagettftext'>function.imagettftext</a>]: Could not find/open font in /*/*/*/qa-plugin/q2a-captcha-antibot-master/AntiBotCaptcha.php on line 124
[14-Jan-2014 12:03:55 America/New_York] PHP Warning:  imagettftext() [<a href='function.imagettftext'>function.imagettftext</a>]: Could not find/open font in/*/*/*/qa-plugin/q2a-captcha-antibot-master/AntiBotCaptcha.php on line 125

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Are you on a shared host or on a vps ?
Do you have Ubuntu ? Which version ?
And which version of Apache ?