Ubertooth problem

[Dman50]

I seem to keep getting this error when i try to use my ubertooth to try to do spectrum analysis. Anybody know whats wrong? I am using python27 and am pretty sure the prerequisites are all installed. Please Help!!!

$ python ubertooth-specan-ui

Exception in thread Thread-1:
Traceback (most recent call last):
  File "C:\Python27\lib\threading.py", line 801, in __bootstrap_inner
    self.run()
  File "ubertooth-specan-ui", line 50, in run
    for frequency_axis, rssi_values in frame_source:
  File "C:\Users\dmach\svn\ubertooth\host\python\specan_ui\specan\Ubertooth.py", line 46, in specan
    self.proc = subprocess.Popen(args, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
  File "C:\Python27\lib\subprocess.py", line 390, in __init__
    errread, errwrite)
  File "C:\Python27\lib\subprocess.py", line 640, in _execute_child
    startupinfo)
WindowsError: [Error 2] The system cannot find the file specified