Thank you for your response Darrius.
Yes, i used their example PHP script and enabled ANS at .... marketplace/merchant Home / Store setup / ANS page ... pointing to the php script on my server like : http://www.slprints.com/slprints/mkt2.php .... and yes, that is the problem, server seems not to be getting the marketplace call for some reason. If i call it on the browser directly, it seems to work fine.
I dont know if i miss anything then :-(
Demian.