[TYPO3-shop] problem listing selected categories and mbi_products_categories

[contact at ingabs.com]

Hello.

I installed tt_product 2.5.1 on typo3 4.0.2. The shop is working, baskek ok,
payement ok and so. I use pages as tree of my shop.

But now I have problem to get categories with mbi_products_categories : when
I set one category to the product, the product disappears, it is not listed
!!! In that case, I can't select categories for my products !

I think the problem is about pid_list or General record storage page or
useStoragePid !

So how can I set the useStoragePid in EM or General record storage page.

Thank you.

Ingabs.