COMSOL help needed. (RF module - Heating of water using waveguide)

Hello there,
I am a relatively new COMSOL user who is in the process of validating a paper, to be able to get a better grasp at COMSOL.
The paper I am trying to validate using my simulation can be found here:
dspace.library.tu.ac.th/bitstr....pdf?origin=publication_detail
On page 547.

I want to use a wave guide to send microwaves in the TE 10 mode to the water body in an air container.
The water body exhibits dielectric loss, The equations are found in table 1 page 550.

I have followed the microwave over(potato) model and feel like I've set up everything appropriately, however when I conduct the study the results indicate that the water body is not heating, perhaps there is a mistake in the way I defined the physics.
I've been trying to crack my head around this, but have had no luck.

In the attachment I've included my model. The paper also describes the boundary conditions in page 547.
The result I wish to achieve is the graph in page 553( Fig. 11 )

Any help or words on this matter will be greatly appreciated.

Kind regards,
Mohammed