I do not understand, because the module through key ta touching the 0006.ad4 0000.ad4 files but not play through the serial. and I've tried all the examples and modifying of all forms. neither I nor the seller who is now my friend can do this work through the serial module. only remains for me to try to use the brand Sandisk 1gb microsd. I will buy this one for testing.
Ps: through key works with any brand 512MB to 4GB. I believe that your work too well. mine is version 1.4 - 2008