wrote in news:1114076731.431292.256570
@g14g2000cwa.googlegroups.com:

"c:/documents and settings/tp 600/local settings/temporary internet
files/content ie5/0D680HQV/HURL[1].ra: Can't read file header!
Unknown file format!"
Why is this if I have downloaded the .ra plug in?

Because Irfanview doesn't play streaming media from a website.
You will have to download the complete file to your HD and then play it.
Or use Real Alternative (Media Player Classic with codec pack).

--
Onno Voors