I went to Redhat web site and download httpd-2.0.55-2.el4s1.8.src.rpm The above package is for RedHat ES 4.0 However, my redhat server still run on Redhat ES 3.0. Can I used the httpd-2.0.55-2.el4s1.8.src.rpm built on my RedHat ES 3.0? In general, It shouldn't work but I don't really know RedHat too well so I hope some of you might know. Thanks, Tom