[SQLObject] Newbie question

[paul <pa...@su...>]

Hi all,

whenever I try to reload a module where I have a class derived from SQLObject 
defined I get:

class ConfigItem(SQLObject):
   File "C:\PROGRA~1\Python-2.3\lib\site-packages\SQLObject\SQLObject.py", line 
152, in __new__
     assert not classRegistry.get(registry, {}).has_key(className), "A database 
object by the name %s has already been created" % repr(className)
AssertionError: A database object by the name 'ConfigItem' has already been created

the module does not create an instance, it just defines the object like this:

class ConfigItem(SQLObject):
   _connection = _conn
   var = StringCol(unique=True)
   value = StringCol()

why is __new__ called when I reload the module and how can I avoid the error?

thanks
  Paul