Wireless Ping Tester Results- Loss rate 3.00% Please help

Hey Guys,

I bought a new rig a few months ago, and am using a recycled USB Wireless Internet Adapter (Linksys WUSB54GC Compact Wireless-G USB Adapter Link: http://www.amazon.com/Linksys-WUSB [...] -4485758). On my old computer all my games ran fine, and now I am getting lag spikes quite often while gaming.

The rig was put together myself, and yes all the newest drivers have been installed. I run Windows Vista-64 Home Premium, (same as my old system, where internet games ran flawlessly on the same wireless adapter). I downloaded a program called ping tester and here are the results.

Sent: 9448
Received: 9165
Lost: 283
Loss Rate: 3.00 %
Min Time: 1 ms
Max Time: 173 ms
Avg Time: 3 ms
Avg TTL: 64

System Stats:
OS: Windows Vista-64 Home Premium
Mobo: MSI 790GX-G65
GPU: ATI Radeon 4890
CPU: AMD Phenom II x4 945
PSU: 750w Antec True Power
USB wifi Adapter: Linksys WUSB54GC Compact Wireless-G USB Adapter

So ya, question is, do I have to get a new wireless Adapter?

*I have tried Vista Anti Lag, WLAN Optimizer, and have deselected the search for better connections option in the , manage wireless network folder.

Any help would be greatly appreciated!
Thanks for your time.