Minifab addi organisation to existing organisatio failure

[rupam150]

I am having two organization running on 2 different machines with the spec file
Spec file on machine 1
fabric:
cas:

• "ca1.org1.example.com"
  peers:
• "peer1.org1.example.com"
• "peer2.org1.example.com"
  orderers:
• "orderer1.example.com"

Spec file on machine 2 -

fabric:
cas:

• "ca1.org2.example.com"
  peers:
• "peer1.org2.example.com"
• "peer2.org2.example.com"

I have followed the each and every step as suggested by @litong01 in the tutorial video , but when i try to approve the chaincode from the machine 2 after installing it , it shows an error ,
rpc::error , error validating proposal , acess denied for channel

i don't know why it is coming from ???

Stuck from days , any help will be appreciated
Thanks in advance !

[rupam150]

[LeoGCRocha]

Follow this steps ct-blockchain@3f51180, using the custom image from CT Blockchain.