Virtuemart 3.0.2 - add comments give error

Hi,
i have problem with integration Kommento on Joomla 3, and Virtuemart 3 ... if i want add comment to product, boom on me pop up window with this error :

Status:
200
Status Text:
OK
Response Text:

and notice, warning and errors are :

Use of undefined constant VMPATH_ADMIN - assumed 'VMPATH_ADMIN' in file administrator/components/com_virtuemart/tables/products.php on line 21

Warning: require(VMPATH_ADMIN/helpers/vmtable.php): failed to open stream: No such file or directory in administrator/components/com_virtuemart/tables/products.php on line 21

Fatal error: require(): Failed opening required 'VMPATH_ADMIN/helpers/vmtable.php' (include_path='.:/usr/share/php:/usr/share/php/PEAR') in administrator/components/com_virtuemart/tables/products.php on line 21

i had problem with integration menu of Kommento in Joomla administration system - solution is here: http://stackideas.com/forums/acl-and-integrations-menu-does-not-open ( i use this file com_virtuemart.php )

This error is only for Virtuemart Product, for Joomla articles is everything fine ...

Thanks ,and sorry for my hard english