[TYPO3] sr_feuser_register extension configuration on typo3 3.8.1

[rocky Ou]

Hey Group,

I put sr_feuser_register 2.2.6 on my typo3 3.8.1 system. I got a very 
strange configuration problem.

According to the online extension manual, I need to create 4 pages and 1 
  sysfolder. below is a substraction from my backend page tree

****snape begin*****
|---sysfolder [id=96] There are 2 user groups
|---My account[id=92] general storage is set to sysfolder [id=96]
    |---forth page [id=95]
    |---third page [id=94]
    |---second page [id=93]

below is my TS constant

plugin.tx_srfeuserregister_pi1.editPID = 94
plugin.tx_srfeuserregister_pi1.registerPID = 93
plugin.tx_srfeuserregister_pi1.confirmPID = 95
plugin.tx_srfeuserregister_pi1.loginPID = 92
plugin.tx_srfeuserregister_pi1.pid = 96

****snape end *******

The problem is that when I delete the TS constant the frontend works ok 
but the users are stored in My account [id=92] not in sysfolder 
[id=96].But if I put the TS constant which should be according to the 
online manual, I the front end does not work. Click on create new users 
does not take me to the registration form.

Can any of you help me on this please?