Wifi - Handoff Among Access Points

Hi,
I have a wireless router and two access points in my house with the same SSID and security configured.  The problem is that when I'm roaming throughout my house, the Charge will not automatically connect to a stronger access point when the signal of the one I'm currently connected to becomes very weak.  I've done extensive searching on this issue and have gone so far as to replace my wireless hardware with those of the same make/model to no avail.  Does anyone know a solution?
Thanks!

I'm fairly certain it is a limitation of the Droid Charge(my current device). My wife has the HTC Thunderbolt and her father has a Droid X. They roam between our access points just fine. All of our laptops are seamless as well. Both of us previously had the Motorola Droid which has the same issue.
I'm using two routers running DD-WRT. Same SSID/Security.
CH1 - Netgear WNDR3700 v2 >> DD-WRT v24-sp2 (06/14/11) std - build 17201
CH6 - Linksys E4200 >> DD-WRT v24-sp2 (06/14/11) big - build 17201
Here are some links. We are not alone...
Support Samsung Galaxy S on Froyo - cannot handover between WiFi Access Points automatically
wifi AP handover/switching
Roaming between multiple wifi access points with same SSID?
Issue 12649: WIFI roaming not working.

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