ManageIQ connect to Vcenter5 issue

Hi all,
I use manageIQ success connect to vmware vcenter5 already, but it’s only display 38 hosts in the managerIQ dashboard panel, but in fact the vcenter has 100+ esxi5.5 hosts in vcenter.
so lots of the esxi hosts doesn’t display through the manageIQ. How can i solve this issue?
Thanks.

@dclarizio can you review this question from @tnndlbmu and forward to a SME if necessary.

The UI normally displays all of the discovered Hosts for a vCenter. @gmccullough or @rpo, do you have any suggestions as to why MIQ might not be finding all of the Hosts?