how to test guaranteed delivery

I want to test Guaranteed Delivery per the instructions in the B2B erver Administrator’s Guide (Chapt 14), however, there is no signature registered for the following services:
wm.server.tx:start (ttl field)
wm.server.tx:execute (tid, ifc, svc fields)
wm.server.tx:end (tid field)

How can I register these signatures?

I received a reply from wm support, indicating that the following procedure should be used to test GD. Write a flow containing the following steps:
invoke pub.remote.gd:start
input: none
output: tid
invode pub.remote.gd:invoke (wm.server:ping)
input: tid
invoke pub.remote.gd:end
input: tid

I’m trying to test guaranteed delivery transaction by creating a flow service with the steps mentioned here.
“invoke” service is not getting executed .
The failure message is

com.wm.app.b2b.server.ServiceException: [B2BCORE.0064.9314] Authorization Required: [B2BSERV.0084.9001] Invalid credentials

What is the authorization that is required??.
Can I get help here.

Thanks,
Anu

I guess I have not created the alias for the Remote server with proper ACL.

Can anybody tell me what should be the ACL for the alias creation so that I can access the pub.gd:invoke service .

Thanks,
Anu