Do you have Bluetooth, are you sure connecting with USB when FW updating. Most BT need configuring to be able to FW update. USB needs the drivers to work, does the GUI work otherwise ok with USB?
What operating system you have?
But just realized your problem is that you are trying to load a 32 bit FW to 8 bit board. there never was 2.30b5 for 32 bit. You should use 8 bit FW. Also use GUI that is related to the 8 bit FW version.