Virtuemart wont add article on other joomla site domains

[nateoz]

Hello..

I run a webshop named: www.rimringzshop.com and if you click on ''bestellen'' and press on add to cart, the product succesfully adds to the shopping cart..
But when you want to do that with :www.rimringzshop.BE & www.rimringzshop.NL,  that dont work (.be and .nl is linked to .com)

two weeks ago it runs fine but now i got this clitch..

Sorry about my bad english.

Hope someone can help me..

With kind regards

Reggie

Joomla version 2.5.9
Virtuemart 2.0.18A