Unable to pull in values from second sup table

Hi all,

I'm unable to pull in data from fields within a second supplemental table - and the data is not even showing in the data output section of the campaign preview.

I have a sup table of bookings, which links back to the list on email address. This in turn needs to pull data from a products table, which uses the PRODUCT_CODE field to link back to the bookings table. My RPL looks like this:

<#data BOOKING as booking>

     <#filter EMAIL_ADDRESS_1 = CONTACTS_LIST.EMAIL_ADDRESS_>

     <#fields PRODUCT_CODE ENCODED_PARAMETERS BOOKING_NAME>

          <#data PRODUCTS as products>

               <#filter PR_PRODUCT_CODE = booking.PRODUCT_CODE>