Hi, I have create custom component for my website and I really like to integrate it with ccomment
Until now I can show ccomment in my custom component but with a lot of error message

Notice: Undefined property: CcommentComponentSongPlugin::$row in C:\xampp\htdocs\Project\administrator\components\com_comment\plugins\com_song\song.php on line 22
Notice: Trying to get property of non-object in C:\xampp\htdocs\Project\administrator\components\com_comment\plugins\com_song\song.php on line 45
Notice: Undefined property: CcommentComponentSongPlugin::$row in C:\xampp\htdocs\Project\administrator\components\com_comment\plugins\com_song\song.php on line 70
Notice: Trying to get property of non-object in C:\xampp\htdocs\Project\administrator\components\com_comment\plugins\com_song\song.php on line 70
Notice: Undefined property: CcommentComponentSongPlugin::$row in C:\xampp\htdocs\Project\administrator\components\com_comment\plugins\com_song\song.php on line 117
Notice: Trying to get property of non-object in C:\xampp\htdocs\Project\administrator\components\com_comment\plugins\com_song\song.php on line 117
Notice: Undefined property: CcommentComponentSongPlugin::$row in C:\xampp\htdocs\Project\administrator\components\com_comment\plugins\com_song\song.php on line 117
Notice: Trying to get property of non-object in C:\xampp\htdocs\Project\administrator\components\com_comment\plugins\com_song\song.php on line 117

And when I try to add new comment in my database show that contentId is zero
So how to fix that $row ? when I try to var_dump it in com_content it show all my database row but I can't find any file that call that data

Thanks in advance.