The driver for windows XP 64 bit is available in suiteusb 3.4 package ( link http://www.cypress.com/?rID=34870).
After installing CySuiteUSB_3_4_4_B184.exe, you will find windows xp 64 bit driver in path C:\Cypress\Cypress Suite USB 3.4.4\Driver\bin\wxp\x64
Thank you very much for your reply. I downloaded the EXE file following your instructions, but the setup file didn't run when I double click it. Strangely the file I downloaded is only 10M while the file size illustrated in the web page is 29M.
Another question is this file is tested on AMD64 platform, so I am wondering if it's compatible for Intel Core 2. I am looking forward to your help. If you do have this file, can you do me a favor to send it to me? My Email is email@example.com.
Problem solved. Thanks!