Help me understand this .psk expot error

Having some issues with Blender 2.67’s export psk./psa. utility. I am not trying to write to a protected folder; I am trying to write to my desktop - but every time I attempt to do so I get


Skeletal mesh data…
Points 4366
Wedges 5127
Faces 8728
Materials 1
Bones 110
Influences 11421
Traceback (most recent call last):
File “C:\Users\Laura\Desktop\Blender\2.67\scripts\addons\io_export_unreal_psk_psa.py”, line 2636, in execute
export(filepath)
File “C:\Users\Laura\Desktop\Blender\2.67\scripts\addons\io_export_unreal_psk_psa.py”, line 1793, in export
file = open(psk_filename, “wb”)
PermissionError: [Errno 13] Permission denied: ‘\ArmObject.psk’

location: <unknown location>:-1

location: <unknown location>:-1


Is this error arising because the script is trying to write in my Program Files directory, which I assume is protected?