Sending a work item to a Person

[Gavin Mooney]

Dear group,

As it's already Friday afternoon or later in most of the world I guess
I'll have to wait until Monday for a response but anyway here we go:

I have dialog step in a workflow that is routed via a rule that
returns a Person ID. From testing the rule in PFAC it seems to work
fine.

In transaction PA30 I created a Communication Infotype (105) - subtype
1 - for the Person and put in my user ID.

When I run the workflow I'm expecting the work item to be delivered to
my Business Workplace but it doesn't go anywhere. The workflow remains
in progress and the work item shows up in the SWI2_ADM1 Work Items
Without Agents report. (The dialog task is a general task.)

I expect I've missed something obvious - any idea?
TIA,
Gavin