hey.. When i'm starting my lfs lapper i'm getting this error message "10/8/2011 5:37:27 PM -> Can't open group file : ./default/./Text_Files/admin1.txt
10/8/2011 5:37:27 PM -> Can't open group file : ./default/./Text_Files/admin2.txt
"

what shall i do ?

Look HERE and HERE (from about Item 6).

There is a section for Lapper (LFSLapper) type issues, and also a thread for the Cruise Addon (CRUISE) that you are using.