1146 Table '****.TABLE_PRODUCT_EXTRA_DESCRIPTION_EXTRA' doesn't exist problem

I can't update any of my products and zen shows me this:

1146 Table 'alepiach_zc1.TABLE_PRODUCT_EXTRA_DESCRIPTION_EXTRA' doesn't exist

What's the problem and how can I adjust it?

in:
[update TABLE_PRODUCT_EXTRA_DESCRIPTION_EXTRA set products_code = null, file_1 = null, file_2 = null, file_3 = null, file_4 = null, file_1_title = null, file_2_title = null, file_3_title = null, file_4_title = null where products_id = '27']
If you were entering information, press the BACK button in your browser and re-check the information you had entered to be sure you left no blank fields.

Maybe I should say, that I can access all my admin pages, but I can't create a new product or editing it!
Moreover the alepiach_zc1 database exists!

Thank you in advance for the reply

Check your add on ... it looks like you did not install one or more files where you should have ...

well I tried to re-upload all the last day uploads... but it seems that they aren't the problem.
So how can I do to adjust it?

There should be a define for the new table:
TABLE_PRODUCT_EXTRA_DESCRIPTION_EXTRA

was a new table added to your database?

how can I check it?

Yes I added a database while I was trying to upload this :http://www.zen-cart.com/index.php?main_page=product_contrib_info&products_id=1242
but there is no unistall file :( what canI do?
thank you

Could you go to your Zen Cart Admin ... and in the Tools ... Developers Tool Kit ... do a search on:
TABLE_PRODUCT_EXTRA_DESCRIPTION_EXTRA

in the bottom input box and select Catalog/Admin and see what files are calling this?

That does not appear to have anything to do with the Tell a Friend add on that you listed ... :unsure:

Sounds like you maybe tried to install this addon ... but didn't upload all the .php files properly: http://www.zen-cart.com/index.php?main_page=product_contrib_info&products_id=1129

that addons was the problem... thank you both DrByte and Ajeh for the help :D

All the best