can't enable JFBConnect - Profiles - VirtueMart 2.x

Hello,
When I enable JFBConnect - Profiles - VirtueMart 2.x I got following error. Please advise.
Warning: require_once() [function.require-once]: Unable to access /mounted-storage/home156/sub025/******/mydomain.org/administrator/components/com_virtuemart/helpers/shopfunctions.php in /mounted-storage/home156/sub025/*******/mydomain.org/plugins/jfbcprofiles/virtuemart2/virtuemart2.php on line 12

Warning: require_once(/mounted-storage/home156/sub025/******/mydomain.org/administrator/components/com_virtuemart/helpers/shopfunctions.php) [function.require-once]: failed to open stream: No such file or directory in /mounted-storage/home156/sub025/*******/mydomain.org/plugins/jfbcprofiles/virtuemart2/virtuemart2.php on line 12

Fatal error: require_once() [function.require]: Failed opening required '/mounted-storage/home156/sub025/s******/mydomain.org/administrator/components/com_virtuemart/helpers/shopfunctions.php' (include_path='.:/usr/share/php5/') in /mounted-storage/home156/sub025/******/mydomain.org/plugins/jfbcprofiles/virtuemart2/virtuemart2.php on line 12

Thank you,

Zayar