"No search query provided" when using base search in a dashboard

OK, so I've been working away on this one for a little while now and can't see what I've missed. I've created a base search, but it doesn't return any results. Rather, it reads "No search query provided", please refer following code sample:

AV Dashboard

-24h@hnowEvent Description*User*

index=sec_antivirus sourcetype="antivirus:symantec:ids" Event_Description="$event_desc_token$" user="$user_token$" | fields *$time_token.earliest$$time_token.latest$nonevaluenone011standardabsolute01searchstats count

Please help. many thanks, P