Wireless networks & multiple PDA's

[viper_larry]

Anyone here have experience of using multiple PDA's on wireless networks?

We use Casio PDA's with Symbol WLAN cards and have found that only 4 devices at a time can connect to the network at the same time. If more than 4 try to logon, then they will fail.

We are using Cisco 3000 VPN concentrators on the backend and movianVPN on the PDA which run PocketPC 2000.

Any ideas?