How to patch linux-aic7xxx-6.2.4-2.4.7.patch.gz ?

[Somsak RAKTHAI]

Dear sir,
  I used RedHat 7.2 and Kernel 2.4.7-10smp.
  I have linux-aic7xxx-6.2.4-2.4.7.patch.gz. I want to
patch system. I follow below.
 1. cd /usr/src/redhat
 2. gunzip -dc /mnt/linux-aic7xxx-6.2.4-2.4.7.patch.gz|patch p1

  Is command correct ?
  If correct, I don"t know why have error messages below.

can't find file to patch at input line 4
Perhaps you used the wrong -p or --strip option?
The text leading up to this was:
--------------------------
|diff -u -r -N linux-2.4.7.virgin/Documentation/Configure.help
linux-2.4.7/Documentation/Configure.help
|--- linux-2.4.7.virgin/Documentation/Configure.help    Thu Jul 19
18:48:15 2001
|+++ linux-2.4.7/Documentation/Configure.help   Wed Aug  1 15:16:08 2001
--------------------------
File to patch:

  Please let me know how to solve this problem.

         thank you very much.
             regards,
              Somsak.