Running RealPlayer binary

Happy New Year! I downloaded the Linux version of RealPlayer and followed there instructions: Once you've successfully completed the download, you will be ready to install the RealPlayer. To do this, you must make the installer executable and then run it: Example: chmod u+x rp8_linux20_libc6_i386_cs2.bin ./rp8_linux20_libc6_i386_cs2.bin But I ran into problems: # chmod u+x rp8_linux20_libc6_i386_cs2.bin Cosmos3:/home/adriel # ./rp8_linux20_libc6_i386_cs2.bin Xlib: connection to ":0.0" refused by server Xlib: No protocol specified Error: Can't open display: :0 Can anyone help me out here? Thanks, Jerome