Stopped working -- HELP!!!!

Have been using pro 1.21 for a long time now... months -- has some quirks but generally worked... couple of days ago it stopped working... unable to get it working again... the secondary machines -- trouble shooting on the secondary machines show big check marks -- doing the configure on the primary machine shows it is connecting ok... but the mouse and keyboard WILL NOT move to the secondary machines... secondary machines show the icon in the system tray as being functional... the primary machine is grayed out in the system tray... this is very frustrating... I have rebooted endless times... uninstalled and reinstalled on all the machines a number of times... just does not seem to work...

Please help...

OS XP Pro on all three... connecting through tcp/ip domain network -- no changes made to the network.

I really need this functionality...

Please help!!!

Thanks