newbie - threading

[martijn at gamecreators.nl]

H!,

I have made a spider and now I want to use threading so it will be
faster faster and faster :)

But I don't understand threading.
So I try this but I get a error in windows 2000.
-----------
class connector(threading.Thread):
    def __init__(self,url):
        self.url = url
        threading.Thread.__init__(self)
    def run(self):
        print self.url #and do the things

.
.
.
while result:

    thread = connector('http://'+result[0])
    thread.start()
    threadlist.append(thread)
    time.sleep(1)

for thread in threadlist:
    thread.join()

-----------

The first 5 url's are oke but then I get a windows 2000 error.
What to do ?

GC-Martijn