It seems like the card you tried required too much power to operate. Unfortunately, some PCs don't provide much electrical current on the USB port. I have experienced this issue on various PCs with my USB-powered Western Digital passport portable hard disk.
If you have access to a local PC store, I would suggest trying another brand/model from there, as this way you don't need to pay to ship it back if it fails also.
When you get another tuner, be sure to try all the USB ports on your laptop. For example, if the laptop has three USB ports and a built-in flash card reader, usually it will have its flash card reader and a USB port on one host controller and the other two USB ports on another controller (internally). As a result, there is a good chance that the USB port that is connected to the same host controller as the built-in flash reader will not provide as much current as the other two USB ports.
With desktop PCs, use the top rear USB ports when connecting to a TV tuner.