Hello i am working with sugar 6.0.3 and the spanish package SugarEnt-6.1.0RC2-lang-es_es-20101101.zip

My problem is that when working with english language package, all labels in the field-edition view are available, but when working in spanish al the labels of the fields are blank. The question is: What is the name of the file containing the names of the labels missing? or How can i fix this problem. . Thanks for helping