Alert is not getting triggered

Hi People, I created a sample app which works with uploaded data in splunk. The data has almost 1700 rows. This data is fixed. I created an alert which is based on triggered condition. The condition is number of results. I added condition in alert is number of results >0 in last one minute. when I do simple search like source="sourcename". Results are returning my 1700 rows. But alert is not triggering. I don't see anything in alert activity( Triggered alert). What am I missing here? Thanks in advance Bheem