error installing developpement driver on fedora 15 machine

Hi

i m tring to install the developpmement driver in my fedora 15 machine with no luck

i have installed the kernel source

but when i run
./devdriver_4.0_linux_32_270.41.19.run

ERROR: If you are using a Linux 2.4 kernel, please make sure
you either have configured kernel sources matching your
kernel or the correct set of kernel headers installed
on your system.

     If you are using a Linux 2.6 kernel, please make sure
     you have configured kernel sources matching your kernel
     installed on your system. If you specified a separate
     output directory using either the "KBUILD_OUTPUT" or
     the "O" KBUILD parameter, make sure to specify this
     directory with the SYSOUT environment variable or with
     the equivalent nvidia-installer command line option.

     Depending on where and how the kernel sources (or the
     kernel headers) were installed, you may need to specify
     their location with the SYSSRC environment variable or
     the equivalent nvidia-installer command line option.

maybe the installer script doesn’t locate source kernel path. Try to look in the help message (–help) and look for show configuration used it. Also u can do that the script installer use the path of your source manually with this options