I finally can get it work. I switched to use the "years ago" 256M Panasonic SD card (Not SDHC) in my digital camera. After SD card insert, 505 shows the photo inside the SD card immediately.
It is the SD card compatibility problem. The problemed SD card is Kingston SDHC's both SD and microSD cards (I don't know why the Sony ebook library can view the SD card in 505 while 505 itself can't view the SD card). However, I'm not sure if it is about the "SDHC not supported" or brand name of Kingston problems. Anyway I believe 505 support SDHC SD Card.
Do anyone have any idea of this compatibility SD card problem?