Dotnet 3.5 C# windows from run very slow on Win8x64

Hi,

I have a dotnet framework 3.5(32bit) windows application installed on a Win8(64bit) computer.
That Win8 machine browsed web pages quickly for Internet Explorer, and it retrieved files on our LAN with no hesitation.
However, when it came to our .net framework 3.5 windows application(sql connection built inside), it runs just too slow.
How do I resolve this problem? 
Thanks for help.

Jason