Ok. You are trying to install the old toolbar and we have to update the toolbar install pages. In the meantime the new one is tested and you can download it as follows.
Go to the url below and click the link to install the toolbar. DO NOT interrupt the install as it can take from 30 seconds to 2 minutes on high speed connections and on slow connections can take 2 minutes to 3 or 4 minutes tyically. If you interrupt the process it may not install correctly.
If you have ANY of the old RCU toolbars go to the About menu or Home menu and uninstall them before installing the new toolbar.
This new one ROCKS. You can search the forums from it. Access your account, forums, marketplace, etc directly.
One last note. There is a FREE popupstopper integrated into this toolbar for our members. DO NOT turn it on while surfing RCU as it will close all popups on our site and you will not be able to post. You can use it on other sites but our marketplace and forums require user created popup windows to bid or post so you MUST disable the popup stopper on RCU. IT IS OFF BY DEFAULT so unless you turn it on explicitly this is not even an issue.
If you have any issues read this post in its entirety again. If that doesn't answer your questions then email me or post the problem.
ENJOY!
http://www.rcuniverse.com/toolbar2/install.htm