RSS email campaign subject line with predefine tag

RSS email campaign subject line with predefine tag

Hi I am trying to use predefined tag  $[RI:TITLE]$ in subject but this did not seem to work

exact text that I have in subject is        Xotels Blog: $[RI:TITLE]$

what did I do wrong?

How can I get the latest blog post tittle in the subjet line of the email of an RSS email campaign