why my board cant connect to maixpy ide

i tried to connect my board to maixpy ide. but it says connecting please wait but cant connect at all. i tried to change the selected board but it doesnt change at all, still the same. any solution for this?
py%20-%20MaixPy%20IDE%2010_24_2019%209_03_33%20AM

hi, please update firmware to newest 0.4, and ide 0.2.4