Do you have more than one connection server running?
See this KB, it was written back for version 5 but still applies
VMware Knowledge Base
You will need to uninstall Horizon View, change the IP address and re-install. If you have a 2nd server, or more, you can just reinstall as a 'Replica' server and the ADAM database will be preserved.
Hope that helps.
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Joe Graziano
Senior Solution Engineer - EUC Federal
VCP7-DTM, VCP6-DM, VCP6-DCV
vExpert, vExpertPro
jgraziano@vmware.com