Connect to database

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after a fight full of blood and tears, I sought my master in the other side of the kingdom(another programmer who has way more experience than me, and was moved to a branch a little far from my working place). He decided to help me and with his help, we slashed the dragons head (compiled the plugin). Now, with the dragon head on my hands, where do I find the magic potion?(I tried to list the drivers to see if it was correctly installed but the PSQL driver doesn`t appears)

here is how I`m looking for the potion:

QStringList test = QSqlDatabase::drivers();
    for(int i = 0;i<test.count();i++){
        qDebug()<<test[i];
    }

QStringList test = QSqlDatabase::drivers();
    for(int i = 0;i<test.count();i++){
        qDebug()<<test[i];
    }

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(Today I woke up been smashed by a D&D book, that may be why I`m writing like this......)

long story short:
we compiled the plugin, 4 files were created at "C:\Qt\2010.05\qt\plugins\sqldrivers"
qsqlpsqld4.dll, qsqlpsql4.dll, libqsqlpsqld4.a and libqsqlpsqld5.a
now I`m trying to use the driver but it says its not found.
how does I make qt learn its existence/install it?

Last updates XD:
I used http://www.dependencywalker.com/ to find the missing .dll of my psql plugin, I added them to the sqldrivers folder and now it only gives me this error log:

Error: At least one module has an unresolved import due to a missing export function in an implicitly dependent module.
Error: Modules with different CPU types were found.
Warning: At least one module has an unresolved import due to a missing export function in a delay-load dependent module.

I`m using a windows 7 - 64bits
another note, I used dependencywalker on the qsqlite4.dll and it gives me exatly the same error log, but its present on the loaded drivers list.....why!? why!? why!?

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Finnaly the last part of the tale.
With a broken sword and a dragons head, I look for the magic potion through every single path on the dragons cave. Many clues I find but no answers for why the magic potion wasn`t on the dragons resting place. After hour of walk through those labirinths called forum topics and documentation, I was completly lost in the middle of all those commands and magic words. Finally after transfering the dragon bones to the ritual`s chamber, the magic seal is broken and the potion appears! With the magic item in hands I follow back to the start of our jorney, to open the gate of the postgre.

(ok, after messing a little more.....man those D&D made something to my head.....)
I took all those .dll I extracted from the postgre bin folder to where my application is been built and it finally recognised the plugin.
So now, without more dragon quest, I will mess with the database as I please ^^.