Please provide a little more detail? What version is the VC running and what version are the 5 new IAPs running?
I have updated all IAP's to version 6.3.1.2-4.0.0.4_42384
Are the new IAPs in the same Vlan as the VC? yes
I believe after reading another thread my issues is mixing IAP-93 and IAP-93-US it seems that all of the IAP-93-US work fine together and the NON IAP-93 work fine with each other just not together.