vps

I have connected HP iPAQ 4350 with cable connector for LG2030. The connection is set up as hayes compatible dial up modem on iPAQ. It does several tries before getting connected. Once connected all functions work as if connected on LAN. However the same LG phone with Laptop connectes in one shot at the same time. Thus there seems to be no network congestion. I have changes cable as well as iPAQ but problem persits. Can some one help , in making this work in one shot and every time.