I have added Agein custom field in service order search page,input filed ,if i click on search based on Ageing input search criteria is not working for this field

Hi Team,

I have added Ageing in custom field in service order search page,input filed ,if i click on search based on Ageing input search criteria is not working for this field.remaining 3 fields it is working fine ,,could you please help here..

These are the  AET feilds.

Thanks

Kalpana