debugging matlab help

attached is a matlab code using fminsearch function in matlab to find the maximum likelihood estimates of the unknown parameters, , given that , are [login to view URL] code is suppose to estimate the unknown parameters, but it does not give satisfactory results for each of these [login to view URL] simple examples of similar loglikelihoods have shown to give results similar to the known parameters with subscripts stars. The log likelihood is given as; Thanks in advance.