MSP430-FLASHER: can't detected com port?or can't find msp430.dll?

Hi Friend:

I want to use  MSP430-FLASHER (command line) to write *.hex to msp430afe253.

and before,i can debug code according to MSP-FET430UIF.(in IAR->FET Debugger's connection is ti USB-IF(COM7),and switch jtag to SBW interface).

but when i start uni-flasher,can't select com port(but usb 1---3),and can't get device's info.updateing firmware or driver is needed,etc.following is detail.

1)in command line,it is said that msp430.dll is missing.2)from UNIFLASH,just usb1-3 was showed.3)in IAR's configure,its shows com port.

4) inform me to do a firmware updated.5)when i press firmware updated,got error and driver is missing.

then another driver install is needed?

or some suggestion?

thx and best regards.

jonny