I am trying to use the Forms option for "Process Error Messaging" for the first time.  It appears easy, but my first attempt is not working and I cannot find Help pages to clarify questions.  My first question is:  How do I need to format the regular expression so that it knows I want this error message to act upon invalid input in the "Applicant Name" field.  This is what I tried first:

My second attempt, putting asterisks before and after the field name in the regular expression field, ended up invalidating the Validation to not allow an ampersand:  [^&]+