Store Simple Password in ASPNETDB

Hi,
 I am trying to save a user in the ASPNETDB using a simple password (5 numbers). There is an exception that says I cannot save the password.
 First I thought i was the password format, but did a simple check to "Clear" and had the same restriction.
 Is there a setting I have to specify in ASPNETDB or in VS2005 to let simple password come thru?
Thanks in advance!
 The code I am using is :
 Dim status As MembershipCreateStatus Try
Membership.CreateUser(UserNameTextBox.Text, PasswordTextBox.Text, EmailTextBox.Text, QuestionTextBox.Text, AnswerTextBox.Text, True, status) Catch ...