an't start a thread Pool from another thread

[Glazner]

Hi all,
I hope someone can help me with this issue
I see that i can't start a thread Pool from another thread, why?

running python 2.6.4 windowsXP
>>> import multiprocessing.dummy as threads
>>> def makePool():
	threads.Pool(3)

>>> makePool()
>>> import thread
>>> thread.start_new(makePool,())
Unhandled exception in thread started by <function makePool at
0x011EA670>
6960