On Mon, 07 Jun 2004 22:46:03 -0400 Rich Renomeron <renomero@xxxxxxxx> wrote: :Even explaining what might :cause an "invalid module format" might help The 2.6 kernel requires modules which are specifically compiled with a new format. Such modules have a .ko suffix, so if your module is "cisco_ipsec.o" instead of "cisco_ipsec.ko", then it is an old format module, and will not work with the new kernel.