What is the error you are getting, was office working before the installation? Try the latest Smartview version Hyperion Smart View for Office | Business Intelligence
If you are getting "add method of addins class failed" error, then add HsTbar.xla (in Smartview\bin) to the addins.
This happens when Smart View is not able to install the xla file. Two things you can try:
1. Un-Install and Install right click and run as administrator.
2. Take a look at HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Excel\Options, if you see multiple open for the same entry and get rid of them