[Freeswitch-users] Channel variable usage in IVR

Hi list... Is it valid to use a variable inside the digits="" element in an IVR? Eg; <entry action="menu-exec-app" digits="/^([${default_ivr_actionkeys}])$/" param="transfer $1 XML features"/> The value of ${default_ivr_actionkeys} is: 12345 It works if I put the list of number in the regex manually but when I try using it with the variable it won't work. I need to create a dynamic set of digits options for our IVR feature because different customers set different keypress options and I need to dynamically generate this from a db. Is there a better way? Thanks, Jm