BAM and USERID

Hi,

The following code send the email whenever the task is completed but
the USERID is blank.

What I could do wrong?

Thanks,

Nam

{ud/GlbAlert.i &TableName = "ProjectTask"}
IF ProjectTask.TaskStatus = "C"
ASSIGN Email-Subject = "Project Task Status" + USERID
Email-Text = "Project Details: ~n~n"
+ " Project ID: " + string
(ProjectTask.ProjectID) + "~n"
+ " Status: " + "Completed" + "~n"
+ " Task ID: " + STRING(ProjectTask.TaskID)
+ "~n"
+ " Description: " + STRING
(ProjectTask.Description) + "~n"
+ " Person ID: " + STRING(ProjectTask.PersonID).
ELSE DO:
END.