ASM Diskgroup Creation Failed Using Two Node

A am new in RAC configuration.I configuring RAC with ASM diskgroup with the external redundency. So now i am facing problem to mount the ASM diskgroup. I am giving the the RAC configuration description below.

1. using two node rac1 and rac2

2. asm disk configuration 3 drive
/dev/raw/raw1
/dev/raw/raw2
/dev/raw/raw3
on both node

3. and i am using vmware to configure the both node asmdisk group

after configuring the os level and oracle clustring , i run dbca to configure asm disk group..so in the create disk screen i have found my previous create 3 disks

/dev/raw/raw1
/dev/raw/raw2
/dev/raw/raw3

so first two disks

/dev/raw/raw1
/dev/raw/raw2

i named it "dg1" then press ok , when i pressed ok a warring is appear that is "could not mount the diskgroup on remote node on rac2 using the connection service rac2:1521:+ASM2. Ensure that the listener is running on this node and the asm instance is registred to the listener. Receive the following error:

ORA-15032 : not all alterations performed
ORA-15063 : ASM discovered insufficient number of disk for diskgroup "DG1"

as the same way i create another diskgroup "fg" for flash recovery area using disk /dev/raw/raw3

so after creating the two diskgroup i saw the two diskgroup is appere in the "diskgroup appere screen" an saw that only one diskgroup is mounted but not second node i.e. rac2 diskgroup is not mounted . What should i do no .