[ubuntu-uk] Cant run RealPLayer 10

[Primax]

Cant run RealPLayer 10

Hi All using Ubuntu 7.10 with all updates.
I downloaded RealPlayer10GOLD.bin to my Home directory.

I used chmod a+x RealPlayer10GOLD.bin [enter]
then sudo ./RealPlayer10GGOLD.bin [enter]
Password [enter]
prompt [enter]
/opt/RealPlayer [enter]
copying files....... [enter]
When asked whether to allow Installer to configure system wide symbolic 
links, type Y, and press ENTER, (this I did)

[enter]

RealPlayer was finished, the Icon came to Applications, Sound & Video.

I put the Icon on the Desktop.

Doubled clicked on it and nothing.

In the Properties of the RealPlayer Icon I see in the Command "realplay"

I can not get RealPlayer to run.

Can any one hep please?

I done exactly from a book called Ubuntu Linux For Non-Geeks

This also comes from some websites about RealPlayer10GOLD.bin
TIA,