hi everyone ,
i installed and realplayer using yum command , but when i try to open realplayer it give me this error
[root@Hamzah-PC Download]# realplay
/opt/real/RealPlayer/realplay.bin: error while loading shared libraries: libgdk-x11-2.0.so.0: cannot open shared object file: No such file or directory

and when try to install gtk2-2.18.3-21.fc12.i686.rpm package it give me those dependency package !
[root@Hamzah-PC Download]# rpm -ivh gtk2-2.18.3-21.fc12.i686.rpm
warning: gtk2-2.18.3-21.fc12.i686.rpm: Header V3 RSA/SHA256 signature: NOKEY, key ID 57bbccba
error: Failed dependencies:
glib2 >= 2.21.3-1 is needed by gtk2-2.18.3-21.fc12.i686
libXcomposite.so.1 is needed by gtk2-2.18.3-21.fc12.i686
libXcursor.so.1 is needed by gtk2-2.18.3-21.fc12.i686
libXi.so.6 is needed by gtk2-2.18.3-21.fc12.i686
libXinerama.so.1 is needed by gtk2-2.18.3-21.fc12.i686
libXrandr.so.2 is needed by gtk2-2.18.3-21.fc12.i686
libXrender.so.1 is needed by gtk2-2.18.3-21.fc12.i686
libatk-1.0.so.0 is needed by gtk2-2.18.3-21.fc12.i686
libc.so.6(GLIBC_2.11) is needed by gtk2-2.18.3-21.fc12.i686
libcairo.so.2 is needed by gtk2-2.18.3-21.fc12.i686
libcups.so.2 is needed by gtk2-2.18.3-21.fc12.i686
libfontconfig.so.1 is needed by gtk2-2.18.3-21.fc12.i686
libgio-2.0.so.0 is needed by gtk2-2.18.3-21.fc12.i686
libglib-2.0.so.0 is needed by gtk2-2.18.3-21.fc12.i686
libgmodule-2.0.so.0 is needed by gtk2-2.18.3-21.fc12.i686
libgobject-2.0.so.0 is needed by gtk2-2.18.3-21.fc12.i686
libjasper.so.1 is needed by gtk2-2.18.3-21.fc12.i686
libpango-1.0.so.0 is needed by gtk2-2.18.3-21.fc12.i686
libpangocairo-1.0.so.0 is needed by gtk2-2.18.3-21.fc12.i686
libpangoft2-1.0.so.0 is needed by gtk2-2.18.3-21.fc12.i686
libpng12.so.0 is needed by gtk2-2.18.3-21.fc12.i686
libpng12.so.0(PNG12_0) is needed by gtk2-2.18.3-21.fc12.i686
libtiff.so.3 is needed by gtk2-2.18.3-21.fc12.i686
rpmlib(PayloadIsXz) <= 5.2-1 is needed by gtk2-2.18.3-21.fc12.i686


how to slove this !
i have to install each package alone ?! am using F11

You need to reload the repository keys. Your yum.conf file and sources list will have the websites. Redownload all keys then upgrade yum.
Try updating realplayer and its dependencies, not everything.