TYPO3 display the subpages of sysFolder directory on menu - typo3

Question

I have a strange behavior of TYPO3 menu, when one of the page is sysFolder, the subpages of this folder don't show in the menu. If I change this type to not visible in menu, the subpages still don't show up.
The code of my menu looks like this:
[PIDinRootline = 1234]
lib.left-menu = COA
lib.left-menu.1 = HMENU
lib.left-menu.1 {
entryLevel = 2
expAll = 1
1 = TMENU
1.noBlur = 1
1 {
wrap = <nav class="left-menu"><ul>|</ul></nav>
expAll = 0
noBlur = 1
NO {
wrapItemAndSub= <li class="inactive first">|</li> |*| <li class="inactive">|</li> |*| <li class="inactive last">|</li>
ATagParams =
}
CUR=1
CUR {
wrapItemAndSub= <li class="cur_inactive first">|</li> |*| <li class="cur_inactive">|</li> |*| <li class="cur_inactive last">|</li>
ATagParams =
}
CURIFSUB=1
CURIFSUB {
wrapItemAndSub= <li class="cur_active first">|</li> |*| <li class="cur_active">|</li> |*| <li class="cur_active last">|</li>
ATagParams =
}
ACT=1
ACT {
wrapItemAndSub= <li class="cur_active first">|</li> |*| <li class="cur_active">|</li> |*| <li class="cur_active last">|</li>
ATagParams =
}
}
2 = TMENU
2.noBlur = 1
2 {
wrap = <ul>|</ul>
expAll = 0
NO{
ATagTitle.field = title
wrapItemAndSub = <li>|</li>
}
CUR=1
CUR {
wrapItemAndSub= <li class="cur_active2">|</li>
ATagParams =
}
CURIFSUB=1
CURIFSUB {
wrapItemAndSub= <li class="cur_active2">|</li>
ATagParams =
}
ACT = 1
ACT {
wrapItemAndSub = <li class="active2">|</li>
}
}
}
[end]