DB_DataObject:Unable to load schema for database and table

Hi all, I'm working on winxp with php 5.1.2 and pear. Usually I work in linux but in this project I have to use windows. I have started the project in linux and now I want to transfer to windows. All seems to work fine, I can create the classes by createtables.php but when I log into my application i get: DB_DataObject Error: Unable to load schema for database and table (turn debugging up to 5 for full error message) I supose this error means that dataobject classes can't access to the database.ini file but it's generated ok. I have reviewed my config.ini file but I don't found any mistake. I also have tested the generator_no_ini=true option, but not work. What could be the problem? Thanks Leo