[Typo3] why can't i log in with my fronted user?

[zsl vincent]

Hallo
      I have created a very easy page tree and the structure is like 
this ----------------------------------------------
rootpage
      page1
      page2
      User(SysFolder)
----------------------------------------------
and i have created a usergroup named "TEAM" and of course create some 
users in this group. and i add a Login form in the page1 and set the 
property "send to page" equal page2 .and at the same time i set the 
visibility settings of page2,that is the Access of page2 is set to "TEAM"
But why when i want to login with a group user from page1,nomatter what 
i input i still can not see the page2. i have thought about this for a 
long time.
thank you for your suggestion.
vincent