SP Transaction Notification - what object type number to use for BP Activity

Have to re-post it, the previous one has been accidently marked as answered.

I'm trying to add some script into SP Transaction Notification and want to make it

run when user add a new "BP Activity" into B1.

What object type number should I use in SP Transaction Notification stored

procedure?

BTW, following this article:

SAP Business One Form Types and Object Types

http://scn.sap.com/community/business-one/blog/2013/07/09/sap-business-one-form-types-and-object-types

I tried 103, but it seems like doesn't work.

103 ActivityTypes object

Thanks.