Onscreen IDE & dynamic instant update [_v0.5.4_]

Hi at all, this is my first reply in this forum, but i have a big problem to start this good Ide program.
My problem occurs when i try to start a new script by clicking the Open button.

I quote the code error below:

Traceback (most recent call last):
  File "IDEmini.py", line 823, in IDE_safeRun
    taskMgr._origRun()
  File "C:\Panda3D-1.7.2\direct\task\Task.py", line 502, in run
    self.step()
  File "C:\Panda3D-1.7.2\direct\task\Task.py", line 460, in step
    self.mgr.poll()
  File "IDEmini.py", line 970, in IDE_doActivate
    exec('import IDE\nfrom IDE import *') in GLOBALS
  File "<string>", line 1, in <module>
  File "C:\Panda3D-1.7.2\Panda3dIDE(unofficial)\IDE.py", line 2028, in <module>
    IDE_SB_createPreferencesButton()
  File "C:\Panda3D-1.7.2\Panda3dIDE(unofficial)\IDE.py", line 1433, in IDE_SB_cr
eatePreferencesButton
    clickSound=0, rolloverSound=0, pressEffect=0)
  File "C:\Panda3D-1.7.2\direct\gui\DirectButton.py", line 62, in __init__
    self.initialiseoptions(DirectButton)
  File "C:\Panda3D-1.7.2\direct\gui\DirectGuiBase.py", line 242, in initialiseop
tions
    func()
  File "C:\Panda3D-1.7.2\direct\gui\DirectFrame.py", line 180, in setImage
    sort = DGG.IMAGE_SORT_INDEX)
  File "C:\Panda3D-1.7.2\direct\gui\DirectGuiBase.py", line 562, in createcompon
ent
    widget = apply(widgetClass, widgetArgs, kw)
  File "C:\Panda3D-1.7.2\direct\gui\OnscreenImage.py", line 49, in __init__
    self.setImage(image, parent = parent, sort = sort)
  File "C:\Panda3D-1.7.2\direct\gui\OnscreenImage.py", line 106, in setImage
    tex = loader.loadTexture(image)
  File "C:\Panda3D-1.7.2\direct\showbase\Loader.py", line 533, in loadTexture
    raise IOError, message
IOError: Could not load texture: IDE_pref.png
Traceback (most recent call last):
  File "IDEmini.py", line 990, in <module>
     IDE_safeRun()
  File "IDEmini.py", line 834, in IDE_safeRun
     IDE_doActivate()
  File "IDEmini.py", line 968, in IDE_doActivate
     sys.modules[__name__] = sys.modules.pop('IDE')
KeyError :  'IDE'

I use Panda3d 1.7.2
Windows Vista 64bit
and the last update of this IDE.

Sorry, if this is a newbie problem,but I’ve followed all the installation process as reported in the first post.

thanks in advance for your help.