moved vm from esx 5.1 to 5.5 unable to have more then 8 cpu cores

Hi all

I had a VM on esx 5.1 that had 8 vcpu cores.

I moved it to a new host with esx 5.5. The new host has 16 physical cores so I want my VM to have access to all of them.

I fixed the license so now my VM should be getting all 16 of them. I can successfully create a new VM that has access to all the processor cores and power it on.

But when I tried to change my VM settings I am still  getting the same number of cores: 8. 

I don't have vCenter. The move was accomplished by copying the vmx and vmdk file over to the new host and right clicking on the .vmx and selecting "add to inventory".

has anyone seen this before?

Thanks