failed to load debugee

Hello everyone,

I am using IAR embedded workbench for programming MSP430FG4618/F2013 and TI USB-FET to program the same. I was able to program the MCU yest and the debugger was working fine. Now it shows an error message and I am not able to dump the code on the device.

The emulator message shown is as follows.

Fatal error : failed to initialize

Check if hardware is connected.

Check if drivers are installed.

Try to restart the computer.

Tools using the parallel port are not supported on vista.  ( I m using windows XP)

Session aborted.

I have verified all of the above, but still I am having the same problem. Any suggestions..??????