I have an odd problem. 3 devices .. a cam, a mouse & an external 40Gb harddisk(and maybe a few more later on). When hooked up directly to the PC,they are recognised n work fine. H/ever when it is hooked up via an an expander USB 4way.. it doesnt work.Atleast the mouse does when disconnected n reinserted but not the other 2. My PC has only 2 USB ports and is 1.1 compliant. All the 3 devices were purchased in the last 6 months.The PC is abt 2.5 yrs old.