Hi Guero,
You couldtry this:
. . .
on error resume next
session.findById("wnd[0]/usr/tabsTAXI_TABSTRIP/tabpT\05/ssubSUBSCREEN_BODY:SAPLV60F:4203/chkRV60F-KFREL").selected = false
if err.number = 0 then session.findById("wnd[0]").sendVKey 0
on error goto 0
. . .
Regards,
ScriptMan