Sounds like it's operating on 802.11b, that's a problem. It's such an old standard and it's transmissions take up a lot of air time and can actually slow down the rest of your network that operates on 2.4Ghz. Also any other devices operating in the 2.4Ghz band can severely interfere with the signal causing it to slow down or require retransmission. Microwaves, electric motors, high amperage lightning, cordless phones can all cause problems