Problem with hyperlink
 

Hi,

When attempting to activate a web page using a hyperlink in Excel 2003,
I get a message:
"Opening"javascript:OWSize ("PR_Popup",http://racingpost.co.uk/horses/trainer_form.sd?trainer_id=693&code=Flat,620,480,' no','yes','yes')"

Hyperlinks can be harmful to your computer data.
To protect your computer, click only those hyperlinks from trusted sources.
Do you want to continue.
YES NO

When I click YES a web page appears for a split second and then closes.
I turned off Pop up blocker but this did not solve the problem.

Why am I having a problem with this hyperlink?
As other hyperlinks work fine in other workbooks when I click them
to activate different web pages.
Can anyone please explain what is causing this and is there any way around
it?

Thanks in advance for your help.

Regards,

Eamon