Upgrading OpenManage software cannot uninstall old version

  I have a Dell Poweredge 2600 running Server 2003.  I am adding 2 more drives to the array and I want to upgrade my software per the Server update utility.  After completing that step, the last thing I needed to do was update to OpenManage 5.2. When I run that application, it tells me to uninstall the old version (3.4) but when I select it in add/remove programs and then select the Open Manage software, and then click on remove, it goes white for 1 second and then returns with no results. No Add/remove programs window---nothing happens.  I also have a ghost drive from not doing the software updates first but I will deal with that after I get the new software in.  Why am I unable to remove the old OpenManage software????