ASTK : error message

Hello

I just have installed CAElinux on my computer on a double boot with windows 7 (before that I was using it on a virtual machine
and everything was fine).
Unfortunately, ASTK doesn't run when I try to launch a calculation.
It displays the following error message :

can't read "astk::config(-1,interactif_tpsmax)": no such element in array
can't read "astk::config(-1,interactif_tpsmax)": no such element in array
while executing
"set val $astk::config($serv,$val)"
(procedure "lance_calcul" line 66)
invoked from within
"lance_calcul $astk::profil(batch)"
(procedure "go_calcul" line 25)
invoked from within
"go_calcul "
invoked from within
".fen.satellite.bas.go invoke"
("uplevel" body line 1)
invoked from within
"uplevel #0

"
(procedure "tk::ButtonUp" line 22)
invoked from within
"tk::ButtonUp .fen.satellite.bas.go"
(command bound to event)

Does anyone have an idea to solve this problem ?

thanks