What's the full Flash Player version? Test at
http://kb.adobe.com/selfservice/viewContent.do?externalId=tn_15507&sliceId=2
or
http://www.adobe.com/shockwave/welcome/
Does a Reset correct the behavior?...
Reset Internet Explorer (IE)
====================
Note: This step will help us clear cookies, restore the security level back
to the default settings, and disable third-party browser extensions. Before
trying the steps, we can export the cookies so they can be easily restored
later if you desire:
1. Press "Alt" from your keyboard, click "File", and click "Import and
Export".
2. Click "Next", select "Export Cookies", and click "Next".
3. The file is saved by default to your “Documents” folder, click "OK".
If you would like to import the cookies after resolving the issue, please
select “Import Cookies” in file menu to import the saved cookies file and
choose the “cookies” file from your “Documents” folder.
For Internet Explorer 6.0:
----------------------------------------
1. Click Start, Run, type: “inetcpl.cpl” (without quotation marks) and press
Enter.
2. Select the General tab, and in the Temporary Internet files window, click
"Delete Cookies", and click OK.
3. In the same tab click Delete Files, check the "Delete all offline
contents" box and click OK.
4. Click the Programs tab, and click "Reset Web Settings".
5. Click the Advanced tab, and click "Restore Defaults".
6. Under the Advanced tab, uncheck "Enable third-party browser extensions"
(requires restart).
7. Click OK.