Ensure you install the software using a user account with Administrator rights. From the control panel, open User Accounts and ensure that the account type you are using is an Administrator Account.
Also, you did not tell us what version of Internet Explorer you are running or which XP Service pack (1 or 2).
The reason we ask this is that there is a file: \windows\system32\comctl32.dll that is used to display the symbols. There have been problems in the past with older versions of this file that broke the whole symbol display.
