Solve “missing iconv.dll” issue on Win7 X64

After installed the mobileme control panel on my Win7 X64, the mobileme control panel cannot be launched with error message "Missing iconv.dll". Even getting this message when system boot up.

Tried to copy iconv.dll into system32 but have no luck. It turns out I have to copy this file into path **C:\Windows\sysWOW64\", then problem solved.