django-admin.py startproject new不能使用解决方法

D:\Python26\Scripts>python django-admin.py startproject sit3

D:\Python26\Scripts>dir
驱动器 D 中的卷是 程序
卷的序列号是 6E32-1E04

D:\Python26\Scripts 的目录

2011-04-13 11:31 <DIR> .
2011-04-13 11:31 <DIR> ..
2011-04-13 11:30 136 django-admin.py
2011-04-14 00:00 <DIR> sit3
1 个文件 136 字节
3 个目录 4,800,430,080 可用字节

后来改变目录到自定义的DB_lbg，开始不行，拷贝文件django-admin.py到自定义目录后就可以了
D:\Python26>cd db_lbg

D:\Python26\DB_lbg>python django-admin.py startproject site
python: can't open file 'django-admin.py': [Errno 2] No such file or directory

D:\Python26\DB_lbg>python django-admin.py startproject site
Error: 'site' conflicts with the name of an existing Python module and cannot be
used as a project name. Please try another name.

D:\Python26\DB_lbg>python django-admin.py startproject site1

D:\Python26\DB_lbg>dir site1
驱动器 D 中的卷是 程序
卷的序列号是 6E32-1E04

D:\Python26\DB_lbg\site1 的目录

2011-04-14 00:02 <DIR> .
2011-04-14 00:02 <DIR> ..
2011-04-14 00:02 0 __init__.py
2011-04-14 00:02 557 manage.py
2011-04-14 00:02 3,383 settings.py
2011-04-14 00:02 557 urls.py
4 个文件 4,497 字节
2 个目录 4,800,348,160 可用字节