Cannot complie aic7xxx_mod.o

Hi,
I get the source code of aic7xxx untar it in my Linux Kernel directory
and go to the directory "/usr/src/linux/drivers/scsi/aic7xxx" to make aic7xxx_mod.o.
But i cannot make the modules. The error is as follows:
My Linux is RedHat 6.2 and kernel version is 2.2.14-5.0 .

Please give me some instructions to achieve it.

Best Regards

Warren