INNO TROUBLESHOOT - Questions Here

[Dragonis40]

Hello everybody! I have an issue with isskin.dll in inno setup welcome page final exe: if I use a version of isskin.dll (395.184 byte, date: 02/12/2012) and mouse scroll, welcome page text scrolls, the scrollbar appears, but it doesn't work (if I try to move scrollbar by using mouse left button or by pressing scrollup or scrolldown button, nothing happens).
If I use another version of isskin.dll (395.184 byte, date: 04/11/2009) and mouse scroll, welcome page text scrolls, the scrollbar appears AND IT works, but the skin i've choosen DOESN'T work (the skin is white reguardless *.cjstyles file).
I've tried several isskin.dll versions founded on internet, but nothing different happens.

Is it a bug? Do I need a specific version of isskin.dll? Thank you!