Vista - IE7 64 Bit Default Browser

I reinstalled my Vista Home Premium 64 bit. Even if I start the 32 bit
iexplorer manually the yahoo chess window (a pop-up window) always uses the
64 bit iexplorer browser, instead of a 32 bit iexplorer. (The 64 bit
browser doesn't support java or flash so it produces an error message about
clearing the browser cache or some nonsense that doesn't work). The default
browser seems to be 64 bit internet explorer no matter how I arrange things
in Vista. Program Defaults does not have the 32 bit as a choice, nor is
there any way to add it as the default, or reassociate the file types.
Arggggggggg! Help appreciated....

jerasmus