[IronPython] ValueError: Absolute path information is required

[Paparipote .]

In Exercise 1: Merlin the Wizard, task 2:
>>>import  clr
>>>clr.AddReferenceToFile("AgentServerObjects.dll")
Traceback (most recent call last):
  File , line 0, in input##1
  File , line 0, in .ctor
  File , line 0, in AddPathList
  File , line 0, in CreateListFromExpressions
ValueError: Absolute path information is required.

Only when I write:
>>>import clr
>>>clr.AddReferenceToFile("C:\Documents and Settings\egironas\My 
>>>Documents\My 
>>>Apps\Py\IronPython-1.0-Beta1\Tutorial\AgentServerObjects.dll")

it works. Questions are why? How can I avoid to write all the path?
Best regards.

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