Value in QSslCertificate::serialNumber ()

Hi guys

Do you guys have any ideas on how to get the value(s) from QSslCertificate::serialNumber()?

It seems that I can't get the 'serialNumber' value from the certificate. All other values such as 'issuerInfo', 'publicKey', 'effectiveDate', 'expiryDate' etc are Ok. Just the 'serialNumber' value is not available. The value seems to be always '-1'. I can read all the .PEM and .DER files, but unable to get the 'serialNumber' value.

Currently I'm using Qt 4.6.0 with OpenSSL support.

Thanks guys :)