Hi Manish,
I am not sure whether I got your question correctly.
But maybe this scenario is a solution for your.
http://help.sap.com/saphelp_gateway20sp05/helpdata/en/17/df1d243c1a4f51a2d9fdaf75be9385/frameset.htm
Here the SAP NetWeaver Gateway hub itself collects the notifications that can then be retrieved via pull from the consumer, for example from your ASP application.
Best Regards,
Andre