um!!...I think the & is breaking the XML,
try
www.domani.com?stg=4&tabid=107
or even try removing the "ReturnNotifyURL" setting in NB_Store and relie on the paypla setting.
try
www.domani.com?stg=4&tabid=107
or even try removing the "ReturnNotifyURL" setting in NB_Store and relie on the paypla setting.