asynchat question

I am trying to write both a server and a client using asynchat.
For both, I have created a common subclass to collect the incoming data:

class SingleServer(as ynchat.async_ch at):
def __init__(self,* args):
asynchat.async_ chat.__init__(s elf,*args)
self.set_termin ator(BLOCKEND)
self.data=[]
def collect_incomin g_data(self,dat a):
self.data.appen d(data)
def found_terminato r(self):
self.processDat a(''.join(self. data))
self.data=[]

The server works well, it waits for a connection and sends a response.

class SecondaryServer (SingleServer):
def processData(sel f,data):
response='??'
peer=self.getpe ername()
print now(),'from %s received %s' % (peer,repr(data ))
if data == 'quit':
if peer[0]=='127.0.0.1':
response='OK'
dispatcher.clos e()
else:
response='KO'
response=respon se+' '+data
print now(),'to %s responding %s' % (peer,repr(resp onse))
self.push(respo nse+BLOCKEND)

However, I am having trouble with the client, who is supposed to send a
question and get an answer in return:

class Server(SingleSe rver):
def __init__(self,m essage,*args):
SingleServer.__ init__(self,*ar gs)
print now(),'connecti ng to EB on %s:%s' % (EBHost,EBPort)
self.create_soc ket(socket.AF_I NET,socket.SOCK _STREAM)
self.connect((E BHost,EBPort))
def handle_connect( self):
print now(),'sending %s' % repr(message)
self.push(messa ge+BLOCKEND)
def processData(sel f,data):
print now(),'received "%s"' % repr(response)
self.close() # XXX is socket closed by base class?

Server(message)

The client connects and send his question. The server answers, but the
client never receives an answer. On the server side, I receive the
following message:

error: uncaptured python exception, closing channel
__main__.Second aryServer connected 127.0.0.1:3432 at 0x7fc968>
(socket.error:( 10053, 'Software caused connection abort')
C:\Python23\lib \asynchat.py|ha ndle_read|88] [C:\Python23\lib \asyn
core.py|recv|35 3])

Can anyone explain why?

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