Get_Dquery_Definitions Error

Hi,

  While i was adding custom field thru AET in between i got Timeout error, then afterwards for converting empty view to search view in

.HTM  i added <thtmlb:Advancedsearch ...> tag but here its giving syntax error

  <thtmlb:Advancedsearch id = 'Adv0'

                     fieldmetada     = "<%= controller->Get_Dquery_Definitions( ) %>"    

   ............

..............

          />

error:Get_Dquery_Definitions does not exist.

please let me know the solution for this,

thanks

shujath