[otrs] dtl "if" statement

I'm trying to make a link in AgentTicketZoom.dtl to a page with customer info. The target page will depend on what queue you're in. Following the examples in the developer docs, I did a simple dtl "if" statement, something like this -- I can see the QueueID just fine. No matter what I do, I cannot set "Adminpage", even with a simple "set" -- < dtl set $Data{"Adminpage"} = "accountinfo.mhtml"; > -- it doesn't work. Version is 2.2.4-01. What am I doing wrong? Thanks.