Maximum Connections to a shared folder

I have a W2k Profesional machine running a 57 mb Access Database. I need this machine to run for a short time(less than a month), and then it will be imported into an SQL format. But when ever I have at least 10 users on this share with the login of “guest”, I am then unable to have any more users login. It seems that W2k Professional can only support 10 concurrent users per share.
Any help would be appreciated.