Warning: require(DIR_WS_COMPONENTincludes/application_top.php)

Hi, just installed the component, and when I want to enter the configurstion I get the following errors:
Warning: require(DIR_WS_COMPONENTincludes/application_top.php) [function.require]: failed to open stream: No such file or directory in /home/heerenva/public_html/administrator/components/com_oscommerce/backup.php on line 24

Warning: require(DIR_WS_COMPONENTincludes/application_top.php) [function.require]: failed to open stream: No such file or directory in /home/heerenva/public_html/administrator/components/com_oscommerce/backup.php on line 24

Fatal error: require() [function.require]: Failed opening required \'DIR_WS_COMPONENTincludes/application_top.php\' (include_path=\'.:/usr/lib/php:/usr/local/lib/php\') in /home/heerenva/public_html/administrator/components/com_oscommerce/backup.php on line 24

What to do about this?

Thanks,
Remco

yes, I did indeed, but I recall the line \\\'$app = JFactory::getApplication(\\\'administrator\\\');\\\' didn\\\'t exist, so I added it, along with the lines stated in the installation guide...

Hi there, any solution for this issue yet?

Thanks,
Remco

Dear support team, I appreciate the support so far, but would very much like this issue to be resolved!!

I tried reinstaling the files with no luck.
As I paid for the component I think I can expect it to work?