Could be, since it also defaults to Pocket_PC. What happens when you change the default name to something else, does it work then? IIRC (its been a while since I used something as fancy as TCP/IP on the PDA, Ive been using arcance ECU protocols over the com-port for the past 2 yrs now) you can have several PDA's with the default name connected to their "hosts" with ethernet/wlan cards using ActiveSync on the same LAN, so it should be possible. One possible work-around would be to check what api calls you use that uses (directly or indirectly) the hostname of the device and see if you can replace them with something that only uses the ip. Its hard to come up with something specific without more information, but I googled a bit using the error message and found this[^] page.
WINS Naming Issues
By default, Microsoft has named the devices Handheld_PC, Pocket_PC and Palm-size_PC.
All of these names contain invalid characters for naming a WINS device. The names can
only be from 1 to 15 characters, a leading character in the range 'a'-'z' or 'A'-'Z',
and the rest of the characters in the range 'a'-'z', 'A'-'Z', '0'-'9', or '-'.
I recommend that all users rename their device prior to synchronizing or using them on
a network to guarantee compatibility
Otherwise, all I could see was Connection Manager issues... Not much, but I HTH some. --- Jonas “Our solar system is Jupiter and a bunch of junk” - Charley Lineweaver 2002