unable to register account - please help

Steps to replicate the issue:

1)In EndNote X3 go to Edit\Preferences
2) Choose EndNote Web -> Register Online button
3) Enter email
4) Fill in registration form
5) Press “accept terms and conditions”

Result: Error message and unable to register

Error message dialog box:
Header: Internet Explorer Script Error
Message: An error has ocurred with the script on the page.
Line:103
Char:5
Error:Object does not support this property or method
Code:0
URL: https://www.myendnoteweb.com/activation/Activation?func=register&

Do you want to continue running scripts on this page?

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Using WinXP, IE7, Word 2007.

Any help would be much appreciated