error message

hello,
Your site is great! But I have a problem with the slider is not responsive? Envoulant look in the “slider” file, I did something wrong and now I can not have accées site and errors:
“Warning: require_once(/homez.741/rwebconc/www/volparamoteur/wp-content/plugins/db-cache-reloaded-fix/db-module.php) [function.require-once]: failed to open stream: No such file or directory in /homez.741/rwebconc/www/volparamoteur/wp-content/db.php on line 94”

“Fatal error: require_once() [function.require]: Failed opening required ‘/homez.741/rwebconc/www/volparamoteur/wp-content/plugins/db-cache-reloaded-fix/db-module.php’ (include_path=’.:/usr/local/lib/php’) in /homez.741/rwebconc/www/volparamoteur/wp-content/db.php on line 94”

Could please help me?
Best regards, NR