Utility is compatible with WinXP/2003/Vista/7 at present. V 1.1=V 1 Try this and you may improve rate. http://www.tp-link.com/en/article/?faqid=409

1. TL-WPA281 will not work by itself. You need to let it join in your exsited network. It will work as a receiver. 2. TL-WPA281 can be set up a same wireless network name as your router but you'd...

Code 020 means network parameters given by your ISP are incorrect. To confirm VPI, VCI, connection type, username and password, try to install again.

Change it back into obtain IP address automatically and check default gateway of local area connection. If nothing, try to hard reset it (holding reset hole about 15 secs) and see what happens. Check...

A tp-link antenna? Make sure it is installed properly. As I know, if connectors are match each other, it should be OK.

Connect ONDA MT191UP to your PC directly for a try. Probably, it is an incompatile issue.