I'm having trouble making use of the ^User(); macro in a workflow.

Specifically, the 'Notify About User' workflow which allows you to create an email message when a new user is registered. I'm attempting to collect data from the user's profile to produce an email.

The tooltip on the message field indicates that Macros are supported, but it seems as if the macros are not being processed before the E-mail is sent.

Code:
Collected Information:
Name: ^User("firstName"); ^User("lastName");
E-Mail: ^User("email");
Company: ^User("workName");
Work Phone: ^User("workPhone");

E-Mail produced is identical to the code (macros not processed)