Error when attempting to activate full version

Hi I am using the full paid version of the plugin, I trying to deactivate the lite version and activate the full version. I am getting the below error. I have followed all the intructions correctly, what is the problem? any help would be great. Cheers

Plugin could not be activated because it triggered a fatal error.

Warning: require_once(/home/nene1494/public_html/jobsearch-testing/wp-content/plugins/post-status-notifier/lib//IfwPsn/Wp/Plugin/Loader.php) [function.require-once]: failed to open stream: No such file or directory in /home/nene1494/public_html/jobsearch-testing/wp-content/plugins/post-status-notifier/post-status-notifier.php on line 15

https://ww.wp.xz.cn/plugins/post-status-notifier-lite/