dhtmlxSpreadsheet plugin for Joomla 3: not run

Hi,
I have some problem to viewing any sheet after installation in my Joomla3 CMS.

  1. I have downloaded this zip file mysyte/b/dhtmlxSpreadsheet_v20/.

  2. Then I used the information stored in readme.txt:
    2a) Unpack archive content to the directory you’d like to install dhtmlxSpreadsheet
    2b) Load index.php in your browser using http path to directory above (for example: yoursite.com/spreadsheet/index.php) and fill in the form with mySQL connection parameters there.
    2c) Therefore I load mysyte/b/dhtmlxSpreadsheet_v20/index.php and I fill all the infos about my Mysql DB.

  3. Now, in my mysql DB there are 5 available tables (SS_data, SS_header, SS_sheet, SS_triggers and SS_user) with just 1 row in SS_sheet table.

  4. Then I have downloaded the plugin from dhtmlx.com/x/download/regular/dh … mla_30.zip and, after correct installation, I have enabled it from administrator page.

  5. Finally I’have created a Joomla content with [[spreadsheet]] (with and without ) but my page is empty. Why?

Could you help me?