HFSS Eigenmode Solver - Only getting TE modes

Hello,

I am doing a simple simulation of a box (A x B x D) and using eigenmode to find resonance. However HFSS is giving me the lowest frequency for TE101, but is seeming to ignore the TM110 mode (which should be at a much lower frequency). Any suggestions on how I can have HFSS properly detect the TM110 mode?

Note: A = D = 15 mm, B = 2 mm
TE101 = 14.13 GHz
TM110 = 7.56 GHz