Login — Member-Only Pages in a context, can't access the login resource

Modx Revolution : 2.07
PHP : 5.2.17
MySQL : 5.0.92-community
Login : 1.5.2

Login form : id 14
loginResourceId : id 19
logoutResourceId : id 14

My first language is French, I hope the following problem is explained properly.

I test the «Making Member-Only Pages» without context, I follow all the instructions and it work like a charm, here my setting.

[[!Login? &loginResourceId=`19` &logoutResourceId=`14` &tplType=`modChunk` &loginTpl=`loginRdaTpl`]]

web context
| login form (ID 14)

member (folder)
| resource 1 (ID 19)
| resource 2
| resource n


But when I try the same thing with a context (with no new setting) in which resources are placed for members only, I can’t access the login resource (id 19) when I am login as a member (web user), it redirect me to my login page ID 14.

[[!Login? &contexts=`secure` &loginResourceId=`19` &logoutResourceId=`14` &tplType=`modChunk` &loginTpl=`loginRdaTpl`]]

Web context
| login form (ID 14)

secure context
|
member (folder)
| resource 1 (ID 19)
| resource 2
| resource n

Do I have to add new settings for this context (Ex: site_start, base_url… )? or the problem is something else?

Thank you for your answers.