Did you uninstall your flash player before re-installing it?
I found this post for IE6:
Uninstalling Flash
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1. Click on Start-> Settings-> Control Panel.
2. In the Control Panel, click on Internet Options.
3. Here, under the General tab, under Temporary Internet Files, click on
‘Settings’.
4. In the Settings box, click on View Objects.
5. This will open up a list of all the web-installed programs. Right click on the
item ‘Shockwave Flash Object’. Select ‘Remove’.
6. A dialog box will appear asking you if you are sure you want to remove
Shockwave, click ‘Yes’.
You can then download and install the Flash and Shockwave Players for IE from the Macromedia websites below:
http://www.macromedia.com/shockwave/...ShockwaveFlash
And
http://sdc.shockwave.com/shockwave/d.../download.cgi?