Delphi interface

[question]

Hi,
i have developed a interface using Delphi 2010, which work perfectly with Windows XP but some of the screen does not work perfectly in Windows 8, i don't know what can be the reason,could anybody please tell me the reason, is that can be a reason that some component of Delphi 2010 doesn't support Windows 8 ?? please need suggestion

my second question is, is that possible to install Delphi 2010 in 64 bit Operating system?

thanks in Advance for your suggestions