WHMCS Integration

Hi,

I have WHMCS v5.1 and WordPress v3.5.

I installed the plugin, but once i activate it, i get the following message:

Warning: chmod() [function.chmod]: Operation not permitted in /home/emsoft/public_html/wp-content/plugins/whmcs-wordpresss-integration/whmcs-integration.php on line 206

And when I goto WHMCS Intergration setting and try to save the IP, it wont save. And gives me following error:

Warning: chmod() [function.chmod]: Operation not permitted in /home/emsoft/public_html/wp-content/plugins/whmcs-wordpresss-integration/whmcs-integration.php on line 206

Warning: chmod() [function.chmod]: Operation not permitted in /home/emsoft/public_html/wp-content/plugins/whmcs-wordpresss-integration/whmcs-integration.php on line 286

AND

WHMCS Integration cannot patch file wp-contents/class-http.php. Make sure it is writable