Software :: Out Of Range Error When Connecting QT With MSSQL

I get this error when running my program under linux; under windows it works as expected:

Code:
$ ./mssql_test
("QSQLITE", "QMYSQL3", "QMYSQL", "QODBC3", "QODBC")
qGetStringData: Error while fetching data ("[FreeTDS][SQL Server]Program type out of range")
QVariant(int, 1) QVariant(QString, "")

I can retrieve int's just fine, but not nvarchar's. I'm using unixODBC 2.2.12 and FreeTDS 0.82. The funny thing is, that I can use isql and tsql with no problem. The mssql_test program:

Code:
#include <QSqlDatabase>
#include <QSqlError>
#include <QSqlQuery>
#include <QDateTime>
#include <QDebug>
#include <QVariant>
#include <QStringList>
#include <QSqlRecord> .....

The same error and output continue for the next records. These have cut out. I've been looking for a solution of a couple of days now, with no luck.