Activation Failure

After I download the plug-in, I receive a vital failure when I attempt to activate it.

WordPress version: 3.6
Autochimp version: 2.15

Error message:

Parse error: syntax error, unexpected T_PAAMAYIM_NEKUDOTAYIM in /home1/ourquar2/public_html/wp-content/plugins/autochimp/autochimp.php on line 852

I would love to use this plugin and look forward to it being fixed.

Thanks,