button token to control search for a panel

Hi i have a panel whose search i am trying to control from button which sets a token to true - $memory_chart$ i have included the below in search |search * $memory_chart$ index=XXXX itemKey ="ms.db.connection_count" name = "$Host$" | timechart eval(round($statistic$(value),0)) as "connection_count"$field2.earliest$$field2.latest$ now panel search starts when button is clicked and $memory_chart$ is true but the search is not working * true index=XXXX itemKey ="ms.db.connection_count" name = "$Host$" | timechart eval(round($statistic$(value),0)) as "connection_count" Any idea how to fix this.