I am not sure what method africo and you developed to accomplish what you were looking for, but (hopefully) as an alternate or for future reference what you can do to ping the manager for the approve/deny task is this-
create a new dialogue. click the Event Configuration tab then click the elipses next to Start Process.
in this model you want to message the manager, and within this message drop the ResponsePageLink component onto your message. when the manager clicks this link, it will bring them to the dialogue start, which you can then build your form accordingly. hope this helps.