Ssl library problem

Hi,

I was working on a project on platform Qt 4.4 & vs 2005. I use some QSsl classes such as QSslError, QSslSocket etc. inside my project. I added the following;

LIBS += ssl\lib

LIB = ..\ssleay.lib into my project file in order to use those Ssl classes including with regarding dll's beside my exe.

After I migrate to Qt 4.8 and vs 2010, those ssl classes became undefined.

I searched through the forms to find what may cause this situation and I generally meet the "configure -openssl ..." stuff. I didn't do this before and everything was working perfectly. I don't understand why I'm taking Ssl errors right now..

Any ideas?