RedHat boot up problem.

I have a Dell T5500 Workstation with Red Hat Linux Enterprise 6 installed on it. On starting the system, I face the following problem. the system boots up and doesnt proceed to the login screen. To analyse the problem I booted into init 3. The system works fine till this point. When I try to boot into init 5, with the following command :

[root@COMP:]#init 5

The following output is generated :

Calling the system activity data collector (sadc) :

Starting portreserve :

Starting irqbalance :  

Kdump  already running :                      [ OK ]

Starting VirtualBox kernel modules :    [ OK ]

Retrigger failed udev events                  [ OK ]

Enabling bluetooth devices :                

Starting ksm :                                         [ OK ]  

Beyond this the system mysteriously does nothing. The login screen never shows up.

Kindly assist me in solving this problem. Any help will be appreciated.

Thanks,