can not start HeartBeat

Hello,

i installed heartbeat on a Rhel-6u3 x86_64 and i need some help to make it start:

[root@Maia ~]# rpm -qa | grep heartbeat
heartbeat-libs-3.0.4-1.el6.x86_64
heartbeat-devel-3.0.4-1.el6.i686
heartbeat-debuginfo-3.0.4-1.el6.i686
heartbeat-libs-3.0.4-1.el6.i686
heartbeat-3.0.4-1.el6.x86_64


[root@Maia ~]# rpm -qa | grep cluster-glue
cluster-glue-libs-1.0.5-6.el6.i686
cluster-glue-1.0.5-6.el6.i686
cluster-glue-libs-1.0.5-2.el6.x86_64


and configured it as detailed bellow:


[root@Maia ~]# cat /etc/ha.d/ha.cf
debugfile /var/log/ha-debug
logfile /var/log/ha-log
logfacility local0
keepalive 2
deadtime 10
bcast eth1
node maia leto
debug 1


[root@Maia ha.d]# cat haresources
maia IPaddr::10.0.2.60/25/eth1 drbddisk::main Filesystem::/dev/drbd0::/drbd::ext4 nfslock nfs


but i wasn't able to start it :

[root@Maia ha.d]# /etc/init.d/heartbeat start
Starting High-Availability services: IPaddr[3371]: INFO: Resource is stopped
Heartbeat failure [rc=1]. Failed.

heartbeat[3428]: 2013/01/16_10:54:25 ERROR: ERROR: cannot load generic interface manager plugin [InterfaceMgr/generic]: No such plugin/interface/interface type
heartbeat[3428]: 2013/01/16_10:54:25 ERROR: Heartbeat not started: module init error.


i'am running a 64bit OS:

[root@Maia ha.d]# cat /etc/redhat-release
Red Hat Enterprise Linux Server release 6.3 (Santiago)
[root@Maia ha.d]# uname -a
Linux Maia 2.6.32-279.19.1.el6.x86_64 #1 SMP Sat Nov 24 14:35:28 EST 2012 x86_64 x86_64 x86_64 GNU/Linux


the genereic.so is in :
[root@Maia ha.d]# locate generic.so
/usr/lib/heartbeat/plugins/InterfaceMgr/generic.so
/usr/lib64/ModemManager/libmm-plugin-generic.so
/usr/lib64/autofs/mount_generic.so

ps: SeLinux is disabled
SELINUX=disabled
SELINUXTYPE=targeted


Thanks