Hard disk drivers at bootup with new kernel

[Phillip <ptho@xxxxxxxxxxxxxxxxxxx>]

We have a High Point Sata controller. When we boot up with an updated 
kernel, the OS reports that it cannot find the disk.

How do we tell the new kernel at boot up where to find the driver?

Details: grub can see the available kernels; booting on the old kernel 
works; booting with the new kernel gives the cannot find disk message.