Estimation of coefficients in MCMCglmm

Hello,
Am I talking to the author of the MCMCGlmm  packages ?
If it's right , I would have a question.
When one adjusts an ordinal model with MCMCglmm, what coefficiens are
estimated (coefficients accessible with model$Sol) : -beta_i or beta_i.
Indeed, I got a coefficient with an unexpected sign.
Cordiallu