Problem Running Module in PyCharm 96.742 Console

I created a new class in Python:

__author__ = 'Michael'
class chapter2(object):
    """Core Python Programming chapter2"""
    version = 1.0 # class static attribute
    def __init__(self, name='first class'):
        """constructor"""
        self.name = name
        print 'Create your first Python class'
    def show(self):
        """display instance attribute and class name"""
        print ' instance ', self.name
        print ' class ', self.__class__.__name__
        print ' version ', self.version
    def exercise1(self):
        """Core Python Programming exercise 2.1"""
        s = 'Duffy'
        i = 2
        x = 3.141592643489759
        print 's = ', s
        print 'i = ', i
        print 'x = ', x
    def exercise2(self):
        """Core Python Programming exercise 2.2"""
        return 1 + 2 * 4

I can import the class successfully, but when I use "dir()" I don't see function "exercise2", and I can't instantiate an instance.  Here's the output I see in the console:

C:\Tools\Python-2.6.1\python.exe -u C:\Program Files\JetBrains\PyCharm 96.742\helpers\pydev\console\pydevconsole.py 2896 2897
import sys; print('Python %s on %s' % (sys.version, sys.platform))
Python 2.6.1 (r261:67517, Dec  4 2008, 16:51:00) [MSC v.1500 32 bit (Intel)] on win32
sys.path.append('C:/Documents and Settings/Michael/My Documents/Projects/Python/learning/core')
>>> import chapter2
>>> dir(chapter2)
['__author__', '__builtins__', '__doc__', '__file__', '__name__', '__package__', 'chapter2']
>>> ch2 = chapter2()
  File "<console>", line 1, in <module>
TypeError: 'module' object is not callable
Traceback (most recent call last):
Can anybody tell me what I'm missing?  Why can I not instantiate my class?  Why don't the methods exercise1() and exercise2() appear?  I've attached a screen shot.  Thanks.