How do I mate two elliptical sheet metal parts in Solid Edge ST9

I would like to assemble a front elliptical plate to a elliptical sheet metal tank to create water type tanker.
The mate technique does not seem to work.
Please help
I have attached a short video clip for clarity to my request.
Help will be appreciated!
Regards, Lionel
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Hello Lionel.
The first method that I will go for mating elliptical sheet metal face (cover) to the elliptical tube is by mating the primary planes of the subjects (face & tube) - these planes run along the axis of the tube (i.e.: axis of the tube lies on these two primary planes). And to finally fully-define adding one more coincident/zero distance mate.
I hope I am able to help you out in this.
Edit: I have attached a video for what I meant in SolidWorks, as I don't have Solid Edge at my end. But I hope something similar can be done in Solid Edge as well.