HKLM,"SYSTEM\CurrentControlSet\Control\Terminal Server\Licensing Core","EnableConcurrentSessions",65537,00000001 put this into hivesys.inf file,any line tcpip.sys connection limit is 16777214 (xp-antispy saying this) Warning WindowsXP-KB884020-x86 patch is restoring original tcpip.sys file termserv.dll has just 2 simultane connections