Hello. I used this article http://www.osronline.com/article.cfm?article=446 to create a driver filter for usb flash. Installed this driver as the upper filter driver. In windbg, when debugging, the breakpoints in the ioread and oiwrite events do not call when I try to read or write data to the device. The breakpoints on the device addition and retrieval events are triggered. What could be the problem?