Well, you were right about the .pro file: the include of mysql.h was not correct, so I redirected the link to MySQL folder in F: and the compilation went better, but a new problem arised:

new problem.jpg

It seems that the compiler has some problem with empty sapaces in the name, and the manual sad to "use short path"... So following this instructions [http://superuser.com/questions/34807...irectory-file] I put PROGRA~1 where there was "Program Files" and MYSQLS~1.5 where there was MySQL Server 5.5. Once again the last problem was corrected, but a new one appeared after dozens of "undefined reference to", and this time I have no idea what to do:

new problem2.jpg