can anyone resolve and send the std file

As the entire member is in one piece with supports at the two ends, the mass load that you have applied are getting lumped at the supports which means there are no masses that can vibrate freely. You will need to split the member so that there are intermediate nodes where masses can be lumped. Here is a sample for your reference LUMPED MASS TOWER_rev.STD

As the entire member is in one piece with supports at the two ends, the mass load that you have applied are getting lumped at the supports which means there are no masses that can vibrate freely. You will need to split the member so that there are intermediate nodes where masses can be lumped. Here is a sample for your reference LUMPED MASS TOWER_rev.STD