Fail to install HP Network card driver for Linux on HP DL380 G7

[hpfuhpfu]

I follow the the readme to install Linux Broadcom driver

# rpm -ivh hp-netxtreme2-7.0.39-2.src.rpm
1:hp-netxtreme2 ########################################### [100%]

# rpmbuild -bb ~/rpmbuild/SPEC/hp-netxtreme2.spec
error: Failed build dependencies:
kernel-%flav-devel-x86_64 = 2.6.32-279.el6.x86_64 is needed by hp-netxtreme2-7.0.39-2.x86_64

Also, I tried to the following command to install but still failed.

# rpmbuild -bb ~/rpmbuild/SPEC/hp-netxtreme2.spec --define "KVER 2.6.32-279.el6.x86_64"

How can I solve this?