installing IE8 on Citirx PS 4.5

I am not able to upgrade IE7 on Citrix presentation server 4.5 to IE8, When I tried to install it I got an error message saying that that IE8 is not supported on this OS.
Citrix is installed on Windows Server 2003 R2 with SP2.
Any ideas?
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Mike ThomasConsultantCommented:
Are you installing it as a standalone or as part of windows update?
rov17Author Commented:
Mike ThomasConsultantCommented:
Check you have the correct installer, or rather try using windows update which will ensure you get the correct one.

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