beryl failure

23605 ?        00:00:00 compiz
23630 pts/0    00:00:00 ps
31166 ?        00:00:02 gconfd-2
32680 ?        00:00:00 login
32682 tty1     00:00:00 bash
[root@lenovo scale]# exit
exit
[adamw@lenovo scale]$ killall -9 compiz; beryl --replace &
[1] 23645
[adamw@lenovo scale]$ **************************************************************
* Beryl system compatiblity check                            *
**************************************************************

Detected xserver                                : AIGLX

Checking Display :0.0 ...

Checking for XComposite extension               : passed (v0.3)
Checking for XDamage extension                  : passed
Checking for RandR extension                    : passed
Checking for XSync extension                    : passed

Checking Screen 0 ...

libGL warning: 3D driver claims to not support visual 0x64
Checking for GLX_SGIX_fbconfig                  : passed
Checking for GLX_EXT_texture_from_pixmap        : passed
Checking for non power of two texture support   : passed
Checking maximum texture size                   : passed (2048x2048)

beryl: Another composite manager is already running on screen: 0
beryl: No manageable screens found on display :0.0
ps -e | grep comp
23646 ?        00:00:00 compiz
[1]+  Exit 1                  beryl --replace
[adamw@lenovo scale]$