Unable to start a Virtual Machine

I have tried to boot the guest domain from the GUI as well as the command line.

From command line I am using the following configuration:

kernel = “/boot/vmlinuz-xen”
ramdisk = “/boot/initrd-xen”
memory = 64
name = “VM%d” % vmid
vcpus = 4
vif = ‘’ ]
disk = ‘phy:sda%d,sda1,w’ % (4+vmid),
‘phy:sda4,sda6,r’ ]
root = “/dev/sda1”
extra = “VMID=%d usr=/dev/sda6” % vmid

when i use the xm create (xm create -c /etc/xen/examples/vm1 vmid=1)

I get the followin message:

Using config file “/etc/xen/examples/vm1”.
Started domain VM1)

But then it doesnt display the login which means it gets crashed.

The log file shows :
WARNING (XendDomainInfo:1645) Domain has crashed: name=VM1 id=5

I do not understand how the values has to be given for disk also?
Please help me to resolve this.

The memory I was giving was less for the VM when I increased the memory to 512 it started but got stuck at one point where it says on the command line:

blkfront: sda1: barriers enabled
blkfront: sda6: barriers enabled
udevd version 128 started

When I go to Virtual Machine Manager gui and select teh serial console to be displayed a blank window is displayed which doesnt ask for login id.
To start the gui when I click the Graphical option the VMM gets closed.

I dont understand is this happening.