InfoPath Form is not retaining value when form is opened

Question

I have two fields with Single line of text DataType.These two fields are updated in the infopath xml from database through time job code and values are updating correctly in the list also. But when i open the same infopath form i could not see the values instead the fields are empty .

If i download the xml and open in notepad i could see the values in the fields but in the infopath filler the values are empty. There are no rules written on form load or submit data for these two fields in infopath. How could i fix this issue?