[TYPO3-shop] pageAsCategory not working

[Ian Solo]

Hello,
I'm unable to make tt_products to work with pageAsCategory = 2

I have some pages with products records inside, but each of these pages 
shows all the products, not only the products in the selected page.

I debugged the code and found that in class.tx_ttproducts_list_view.php 
line 379:
$pid = $pageViewObj->getModelObj()->getParamDefault($theCode,  
$this->pibase->piVars[$pageViewObj->piVar]);
after this line $pid is empty, but I guess that is should be set to the 
PID of the current page.
If I hack it, setting manually $pid with the page ID of the current 
page, then it works.

TYPO3 4.5.7
tt_products 2.7.2

Any tips?
Thanks,
ian