AC-DC power Supply using TNY277PN

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Hi,
i am working on power supply for AC to DC 5V/2A using TNY277PN . I have made design as per power intergartion software and made transformer too as per specification given but at output i am not getting proper output a i am only getting 3V .
Please help me this my mail id :shahrukh.sp@gmail.com
whatsaap NO:9130631691
PFA of Schematic and transformer datasheet ..

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TinySwitch-III_PIDesign2.uds1.2 MB