progress stop at 48% in JTAG mode

hi:

I use a custom board which designed by myself,now I have some questions :

1: I have detected the FPGA chip on board, but when I started to download .sof file to the FPGA chip ,in programmer window ,the "Progress" show 48% and stop ,why it cannot reach 100%?

2: I draw two boards ,one is a power board,the other is a FPGA board,I check the VCCIO is 3.24V, and core volt of FPGA is 1.78V ,the two voltages are decaied which should be 3.3V and 1.8V,so I think the reason mybe lay here,

1)so what is the scope of the decaied value if the FPGA still work OK?

2) If the quartusII can auto-detect the FPGA,then whether I can get a conclusion, that is the power supply is OK?

3:The power chips I used can supply 0.8A of 1.2V,So I think it is not the reason of the drive capability,am I rigth?

(The FPGA chip is EP2C35F484

and I give the attachments

)

I donnot kown what to do to solve the problem,please give me some advice ,thanks a lot~