[tahoe-dev] crypto for PB is unawailable

[pc3QT]

Hello all.
I started experimenting with tahoe lafs recently, and I want to set up
my own test grid, since the official one is unavailable. But the
problems are emerging as early, as I want to start an introducer. On
windows, everything is working fine. But when it comes to linuks,
(debian squeeze and python 2.6.6), it prints such error:
    c =
introducer.IntroducerNode()                                            
  File "/home/killer/tahoe/src/allmydata/introducer/server.py", line 19,
in __in
it__                                                                           

    node.Node.__init__(self,
basedir)                                          
  File "/home/killer/tahoe/src/allmydata/node.py", line 82, in
__init__        
   
self.create_tub()                                                          
  File "/home/killer/tahoe/src/allmydata/node.py", line 174, in
create_tub     
    self.tub =
Tub(certFile=certfile)                                          
  File
"/home/killer/tahoe/support/lib/python2.6/site-packages/foolscap-0.6.4-py
2.6.egg/foolscap/pb.py", line 240, in
__init__                                 
   
self.setupEncryptionFile(certFile)                                         
  File
"/home/killer/tahoe/support/lib/python2.6/site-packages/foolscap-0.6.4-py
2.6.egg/foolscap/pb.py", line 252, in
setupEncryptionFile                      
   
self.setupEncryption(certData)                                             
  File
"/home/killer/tahoe/support/lib/python2.6/site-packages/foolscap-0.6.4-py
2.6.egg/foolscap/pb.py", line 261, in
setupEncryption                          
    raise RuntimeError("crypto for PB is not available,
"                      
exceptions.RuntimeError: crypto for PB is not available, try importing
foolscap.
crypto and see what
happens                                                    
                                                                               

Failed to load application: crypto for PB is not available, try
importing foolsc
ap.crypto and see what happens
_____________
Where is the problem?
Best regards.