Hello and Welcome to the board.

What version of KiXtart are you using? Most of the older versions had problems with that. Not until 4.52 Beta 2 was most of it ironed out. Some was in 4.51 as I recall, but not fully till 4.52 I think.

Also might want to use this sort of code so you don't keep trying to create a folder that already exists.

Code:
If GetFileAttr($Folder) & 16
  Exit 80
EndIf