Description of problem:
Platform:IBM X3650 server 64 bit,IA32e. RHEL4.5 already installed.
When I use up2date to check anything new, an error occured:
Output from up2date –d 
********************************************************************************
# up2date -d 
  
(up2date:5838): libglade-WARNING **: unknown property `ellipsize' for class `GtkLabel' 
  
(up2date:5838): libglade-WARNING **: unknown property `width_chars' for class `GtkLabel' 
  
(up2date:5838): libglade-WARNING **: unknown property `single_line_mode' for class `GtkLabel' 
  
(up2date:5838): libglade-WARNING **: unknown property `angle' for class `GtkLabel' 
  
(up2date:5838): libglade-WARNING **: unknown property `ellipsize' for class `GtkLabel' 
  
(up2date:5838): libglade-WARNING **: unknown property `width_chars' for class `GtkLabel' 
  
(up2date:5838): libglade-WARNING **: unknown property `single_line_mode' for class `GtkLabel' 
  
(up2date:5838): libglade-WARNING **: unknown property `angle' for class `GtkLabel' 
  
(up2date:5838): libglade-WARNING **: unknown property `ellipsize' for class `GtkLabel' 
  
(up2date:5838): libglade-WARNING **: unknown property `width_chars' for class `GtkLabel' 
  
(up2date:5838): libglade-WARNING **: unknown property `single_line_mode' for class `GtkLabel' 
  
(up2date:5838): libglade-WARNING **: unknown property `angle' for class `GtkLabel' 
  
(up2date:5838): libglade-WARNING **: unknown property `add_tearoffs' for class `GtkComboBox' 
  
(up2date:5838): libglade-WARNING **: unknown property `ellipsize' for class `GtkLabel' 
  
(up2date:5838): libglade-WARNING **: unknown property `width_chars' for class `GtkLabel' 
  
(up2date:5838): libglade-WARNING **: unknown property `single_line_mode' for class `GtkLabel' 
  
(up2date:5838): libglade-WARNING **: unknown property `angle' for class `GtkLabel' 
  
(up2date:5838): libglade-WARNING **: unknown property `ellipsize' for class `GtkLabel' 
  
(up2date:5838): libglade-WARNING **: unknown property `width_chars' for class `GtkLabel' 
  
(up2date:5838): libglade-WARNING **: unknown property `single_line_mode' for class `GtkLabel' 
  
(up2date:5838): libglade-WARNING **: unknown property `angle' for class `GtkLabel' 
  
(up2date:5838): libglade-WARNING **: unknown property `ellipsize' for class `GtkLabel' 
  
(up2date:5838): libglade-WARNING **: unknown property `width_chars' for class `GtkLabel' 
  
(up2date:5838): libglade-WARNING **: unknown property `single_line_mode' for class `GtkLabel' 
  
(up2date:5838): libglade-WARNING **: unknown property `angle' for class `GtkLabel' 
  
(up2date:5838): libglade-WARNING **: unknown property `ellipsize' for class `GtkLabel' 
  
(up2date:5838): libglade-WARNING **: unknown property `width_chars' for class `GtkLabel' 
  
(up2date:5838): libglade-WARNING **: unknown property `single_line_mode' for class `GtkLabel' 
  
(up2date:5838): libglade-WARNING **: unknown property `angle' for class `GtkLabel' 
  
(up2date:5838): libglade-WARNING **: unknown property `ellipsize' for class `GtkLabel' 
  
(up2date:5838): libglade-WARNING **: unknown property `width_chars' for class `GtkLabel' 
  
(up2date:5838): libglade-WARNING **: unknown property `single_line_mode' for class `GtkLabel' 
  
(up2date:5838): libglade-WARNING **: unknown property `angle' for class `GtkLabel' 
Segmentation fault 

As I searched from the Internet, a suggested solution is using yum to instead of up2date. I tried once to yum update from CentOS x86_64 4.6, it could run. But I just tried to download some package not update anthing. Then I found use this method will have a potential compatible problem.
So I tried to reinstall up2date. I ran "yum remove up2date", and download follow rpm from RedHat official web:
up2date-gnome-4.6.2-7.el4_6.1.x86_64.rpm 
up2date-4.7.1-17.el4.x86_64.rpm
I installed them and set the proxy server, then an error encoutered:
******************************************************************
         Error communicating with server. The message was:
         Error Message:
          Your account does not have access to any channels matching (release='4', arch='ia32e-redhat-linux')
          If you have a registration number, please register with it first at http://www.redhat.com/apps/activate/ and then try again.
          Error Class Code: 19
          Error Class Info: Architecture and OS version combination is not supported.
         Explanation: 
          An error has occurred while processing your request. If this problem
          persists please enter a bug report at bugzilla.redhat.com.
          If you choose to submit the bug report, please be sure to include
         details of what you were trying to do when this error occurred and
         details on how to reproduce this problem.

Is this problem related with I download things by yum from CentOS? 
Do you know how to solve this problem? What should I do? Thanks a lot.