Custom token referenced in another token

Hello Marketo community,

I built a custom token named {{my.Prior Month MMMM}} in my active marketing campaigns folder that reads:

#set($calendar = $date.getCalendar())  

$date.format('MMMM',$calendar)

This populates in email copy successfully when referenced, e.g. "June", "May", etc.

I'm trying to reference this token with a custom token named {{my.PNGreetingSurpluskWhvsOnTrack}} in a program that is nested within the active marketing campaigns folder. When I include it in the token below, it doesn't populate in an email and just displays the token name. Any recommendations would be greatly appreciated. Thanks!

Daniel

Custom token {{my.PNGreetingSurpluskWhvsOnTrack}} to be referenced in an email draft:

##check if the monitored production is > OR < estimated production

##check if the monitored production is > estimated production

#if(${lead.pNOnTrackClassification} == "100+")

  ##if the lead has more monitored production than estimated, tell them how large the surplus kWh hours were

  #set($my.PNGreetingSurpluskWhvsOnTrack = "Your system produced ${lead.pNMonitoredvsEstimatedSurpluskWh} kWh more than we forecasted in {my.Prior Month MMMM}!*")

##check if the monitored production is < estimated production

#else

  ##if the lead has less monitored production than estimated, tell them they are on track

  #set($my.PNGreetingSurpluskWhvsOnTrack = "Your system's {{my.Prior Month MMMM}} production was right on track with forecasted production!*")

#end

${my.PNGreetingSurpluskWhvsOnTrack}