[Typo3-shop] wrong parameters and fatal errors

[Steven]

Hi there,

i'm using typo3 3.8 with tt_products 2.2.9.

Just tried to set up tt_products. i have set all the PID's i need for 
the Basket page, Single page, etc.

If i now klick on a product title to get the single view i always get 
following message:

Wrong parameters, GET/POST var 'tt_products' was missing or no product 
with uid = 5 found.



If i try to put a product into my basket i get the following message:

Fatal error: Call to undefined function: () in 
/srv/www/htdocs/typo3_src-3.8.0/typo3/ext/tt_products/lib/class.tx_ttproducts_basket_div.php 
on line 428



can anyone help me with that?


greetz
steven