Shared drive in Windows 2000 Pro machine

I have installed a second drive in a Windows 2000 Pro machine. I have shared this drive. But it looks like Windows 2000 Pro will only let 10 computers mapp to this drive. I need more than 10 people to be able to use this drive. Is there something that I can do to increase the number of users that can mapp to this drive? I have searched windows.com for an answer and have come up with nothing.