ESX 5.5 host disconnect from vcenter 5.5 when create a new vm

Hi

I installed ESX in nested environment on vm workstation. i installed vcenter 5.5 on windows 2012. when i create a new vm using vcenter my ESX host disconenct but when i create new vm on stand alone ESX host it is successful. and when i try to power on that vm from vcenter again it disconnect but error is different. i am attaching the screen shot of the errors.pleas if anybody know help me out.