You are very late to the party if your deadline is in one week. Try using the Dynare unstable version. It will find a steady state (you may have to increase maxit). The problem with your model is that there is a singularity issue and the model features three unit roots.
Are you sure that the objects you try to compute endogenously are really endogenously determined? See e.g. [An infinity of steady states with Taylor rules) for an example of what can go wrong.