centos4.6i386 2.6.9-67.ELsmp内核上安装xenU-2.6.9-67.EL.i686.rpm 启动报error13

lingfengno1

在一个centos4.6 i386系统上内核为2.6.9-67.ELsmp，  安装iso自带内核包kernel-xenU-2.6.9-67.EL.i686.rpm，安装过程中报错
WARNING: No module mptbase found for kernel 2.6.9-67.ELxenU, continuing anyway
WARNING: No module mptscsi found for kernel 2.6.9-67.ELxenU, continuing anyway
WARNING: No module mptspi found for kernel 2.6.9-67.ELxenU, continuing anyway
WARNING: No module mptsas found for kernel 2.6.9-67.ELxenU, continuing anyway
将/etc/modprobe.conf 中相对应项去掉之后，没有报错信息，但 无论安装xenU时报错与否，修改grub.conf 重起系统后，都不能进入系统

报错如下：
Error 13 ：Invalid or unsupported  executable format

ps:小弟是个新手，不知道该从何着手解决，望各位大虾指点