Unable to attach URL's to Entourage 2008

[generdude]

I am experiencing a problem that never occurred in Office 2004. Whenever I try to attach a website's URL to an email in Entourage 2008, I get a warning that it may have a virus. I still send it anyway, but when it arrives, it comes in as a blank Text Edit document, or sometimes it just says it's a damaged file. I used to just drag the URL into the main body of the email, but this version of Entourage automatically tries to puts it in Attachments. I've tried I've tried many different URL's and the same thing always happens.
G5 iMac 10.5.5