Install fails on RHEL 5.2

I wonder if this is the problem:

"INFO - 2009-01-21 10:39:24 - Disabling SELinux during installation...
INFO - 2009-01-21 10:39:24 - setenforce 0 failed: 1"

Installing the deps manually via yum worked fine.

[root@calgary05 ~]# uname -a
Linux calgary05.cit.cornell.edu 2.6.18-92.1.18.el5 #1 SMP Wed Nov 5 09:00:19 EST 2008 x86_64 x86_64 x86_64 GNU/Linux

[root@calgary05 ~]# cat /etc/issue
Red Hat Enterprise Linux Server release 5.2 (Tikanga)
Kernel \r on an \m

[root@calgary05 ~]# cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Xeon(R) CPU X5355 @ 2.66GHz
stepping : 8
cpu MHz : 2659.617
cache size : 4096 KB
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss syscall nx lm constant_tsc up pni cx16 lahf_lm
bogomips : 5399.33
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management: