Error in computing likelihood

[WANGFAXIAN]

Hi,

I have a problem with estimation. After loading the data, I get the following error message:
--------------------------------------
Loading 79 observations from paper.m

Error in computing likelihood for initial parameter values
??? Error using ==> print_info at 40
Blanchard Kahn conditions are not satisfied: no stable equilibrium

Error in ==> initial_estimation_checks at 101
print_info(info, options_.noprint)

Error in ==> dynare_estimation_1 at 122
initial_estimation_checks(xparam1,gend,data,data_index,number_of_observations,no_more_missing_observations);

Error in ==> dynare_estimation at 62
dynare_estimation_1(var_list,varargin{:});

Error in ==> lunwen at 308
dynare_estimation(var_list_);

Error in ==> dynare at 120
evalin('base',fname) ;

[WANGFAXIAN]

This is my code :