[Tinyos-help] could not open port: (5, 'CreateFile', 'Access is denied.')

[abensong]

When trying to install a program on my TelosB mote, I get the following error: 
could not open port: (5, 'CreateFile', 'Access is denied.')  I know that this 
means the com port is busy, but how do I free it up.  The mote currently has a 
program on it that I think is using the port, but I am unable to erase that 
program.  Any help would be greatly appreciated.

Thanks,
Angelina