i have gone to  the properties of a created shortcut i put "C:\Program Files\Java\jre6\bin\java.exe" -Xmx1024M -Xms512M -cp Minecraft.exe net.minecraft.LauncherFrame on    
on target it worked and applied perfectly but now i log in to minecraft and it says u need a 32 bit not a 64 but my computer is a 64 bit computer ?? why