IPv6 serial interface configuration not working

[Jeiky1]

I am configuring IPV6 in GNS3 lab environment for studying and when I configured the IP address, in Fa0/0 and S0/0 on both routers (R1 and R4) the Serial interface goes UP/UP for a few seconds and then it goes UP/Down and I am unable to ping the other side of the Serial Interface. I realized the S0/0 was obtaining the same Link Local IP than FA0/0; therefore, I manually change the link Local IP, but it did not help. Please, help me with this. Your help will be greatly appreciated. I tried the same configuration using IPV4 and everything works fine. 

IOS: (C2691-ADVENTERPRISEK9-M), Version 12.4(25d)

R1>sh ipv int bri

FastEthernet0/0            [up/up]

    FE80::C200:99FF:FEA0:0

    2001:11AA::1

Serial0/0                  [up/down]

    FE80::C216:C4FF:FEE4:0

    2001:22AA::1

INTERFACE CONFIG R1

interface FastEthernet0/0

 no ip address

 duplex auto

 speed auto

 ipv6 address 2001:11AA::1/64

!

interface Serial0/0

 no ip address

 ipv6 address 2001:22AA::1/64

 ipv6 address FE80::C216:C4FF:FEE4:0 link-local

 ipv6 enable

 clock rate 2000000

[Jeiky1]

I just found the solution to this problem. It seems that in order for this configuration to work in GNS3, you have to first establish the serial link before creating all other links. Once you have successfully ping the other side of the WAN link, then you can start to configure all other links.