I have been trying to get the VZ mobile hotspot to work with my laptop, but the laptop won't grab an IP address.

I'm able to get on the internet if I manually configure my IP/gateway/DNS settings as-per post #14 by Timmy T. in the "Mobile HotSpot problem (Windows Vista?) " thread. (Can't post the link).

...But I can't get DHCP to work all the time. I don't think it's a WPA2 issue, as I've tried that both enabled and disabled (and I can get on with the above workaround with WPA2 enabled).

Here's what has has/not worked:
iPod Touch - Worked fine w/ DHCP. No issues.
HP Laptop (Vista) - No IP address
HP Laptop (Win 7) - No IP Address
Palm Treo Pro - Connects / disconnects frequently. Not exactly sure what the problem is, but I can't get a reliable connection. Assume a similar DHCP issue.

Does anyone have any suggestions for how to get my laptop to grab an IP address automatically. Not sure if it something on the Pre+ side or the laptop side that is causing the issue.