TOPIC: Configuration->Emails->Paid Status Chnge Email->Invoicing?

Why is it that I can't get the GROUP MEMBER function to work? I have the following code in the email as part of an invoice:

[BOOKING_TYPE_FULL]
The number in your group is [GROUP_NUMBER].
{GROUP_MEMBER}
Name: [TITLE] [FIRSTNAME] [LASTNAME]
[EVENT_NAME] [EVENT_DATE]
[BOOKING_TYPE_FULL][BOOKING_TYPE_FRI][BOOKING_TYPE_SAT][BOOKING_TYPE_EXT_VISIT][BOOKING_TYPE_COURSE][BOOKING_TYPE_FULL_PREGST][BOOKING_TYPE_FRI_PREGST] [BOOKING_TYPE_SAT_PREGST] [BOOKING_TYPE_EXT_VISIT_PREGST] {/GROUP_MEMBER}

The mail appears like below and I don't even get each name appear:

The number in your group is 5.
{GROUP_MEMBER}
Name: Bob Hope
2013 Adelaide IRSE AGM & Technical Meeting - Fri/Sat/Sun Full Registration Friday, 15 Mar 2013
{/GROUP_MEMBER}

the [BOOKING_TYPE...] fields have the details of rates used but does display on single bookings, the [BOOKING_TYPE_FULL] at the start is only in to check the function works outside of the {GROUP_MEMBER} function

Rate: Non IRSE Member $490
The number in your group is 1.
{GROUP_MEMBER}
Name: Mr vxcv vxcv
2013 Adelaide IRSE AGM & Technical Meeting - Fri/Sat/Sun Full Registration Friday, 15 Mar 2013
{/GROUP_MEMBER}

I'd like to be able to show each rate with each name and then the invoice add it all up with the tax.

Also is there any way of when I get this working that I could change it to sending out a PDF Invoice, so I could keep the formatting nice.

Regards
Bill