dhcp error

hi.....i have a win2k server(active directory) for a small home network.i also use this box for my vpn server(dhcp and dns server installed-ras configured).people can vpn into box no problem....however...the problem im having is after the server has been up and running for a few hours i get a warning in event viewer(system-event id 20169) that the remote access server was unable to contact a dhcp server.it was able to see it and service clients with a valid ip for three hours but all of a sudden now it cant.

i stop and restart the dhcp server and all is fine for a few more hours.the only other error in event viewer is event id 5781(dynamic registration or deregistration of one or more dns records failed because no dns servers availible).people can still vpn in after this error so it may be meaningless.ive tried to fix it with microsofts solution but to no avail.im alittle fuzzy on dns so im not even sure i should disable dynamic dns registration or not.as ive stated earlier the box is just for home network and a few vpn clients.

i`d appreciate it if anyone can solve this problem or send me in the right direction.thanx

the vpn clients range from win2k pro to win xp pro.please bear with me i am a noob...i`m gonna list in chronological order the events i see in event viewer(system)

#1) info:source=event log , id=6009 time=7:46
description)microsoft windows 2000 5.0 2195 service pack4 uniprocessor free

#2)info:source=event log , id=6005 time 7:46
description)the event log service was started

#3)warning:source=disk , event id 34 time=7:45
description)the driver disabled the write cacheon device \Device\hardisk0\dro

#4)info:source=browser , event id =8015 time=7:46
description)the browser has forced an election on network \device\NetBT_Tcpip_{399C6642-BCF3-47DF-9B1E-3E74267E8AFE}because a windows 2000 server(or domain master) browser is started

#5)warning:source=netlogon , event id =5781 time=7:46
description)dynamic registration or deregistration of one or more dns records failed because no dns servers are availible

#6)info:source=browser , event id = 8015 time=7:47
description)The browser has forced an election on network \Device\NetBT_Tcpip_{6F2594A5-94DC-4411-BB31-B0A1FBA39D7E} because a Windows 2000 Server (or domain master) browser is started.

#7)info:source=dhcpserver , event id=1044 time=7:47
description)The DHCP/BINL service on the local machine, belonging to the Windows Administrative domain wrath.com, has determined that it is authorized to start. It is servicing clients now

#8)info:source=remote access , event id=20088 time=8:19
description)The Remote Access Server acquired IP Address xxx.xxx.1.13 to be used on the Server Adapter.

#9)info:source=browser ,event id=8015 time=8:19am
description)The browser has forced an election on network \Device\NetBT_Tcpip_{C6AC2240-0DF7-4C1E-B958-0A0CA37DD618} because a Windows 2000 Server (or domain master) browser is started

#10)info:sourse=browser , event id=8035 time=8:24
description)The browser has forced an election on network \Device\NetBT_Tcpip_{C6AC2240-0DF7-4C1E-B958-0A0CA37DD618} because the Domain Controller (or Server) has changed its role

#11)warning:source=netlogon ,event id=5781 time=10:04
desription)Dynamic registration or deregistration of one or more DNS records failed because no DNS servers are available

#12)warning:source=netlogon ,event id= 5781 time 12:04pm
description)Dynamic registration or deregistration of one or more DNS records failed because no DNS servers are available.

#13)warning:source=netlogon , event id=5781 time 2:04pm
description)Dynamic registration or deregistration of one or more DNS records failed because no DNS servers are available


#14)info:source=dhcpserver ,event id=1044 time 2:26pm
description)The DHCP/BINL service on the local machine, belonging to the Windows Administrative domain wrath.com, has determined that it is authorized to start. It is servicing clients now

#15)warning:source=remote access ,event id=20084 time 2:50
description)The Remote Access Server will stop using IP Address xxx.xxx.1.13 (either because it was unable to renew the lease from the DHCP Server, the administrator switched between static address pool and DHCP addresses, or the administrator changed to a different network for DHCP addresses). All connected users using IP will be unable to access network resources. Users can re-connect to the server to restore IP connectivity

#16)info:source=browser , event id=8033 time 2:50
description)The browser has forced an election on network \Device\NetBT_Tcpip_{C6AC2240-0DF7-4C1E-B958-0A0CA37DD618} because a master browser was stopped

I believe #3 is becuase my cdrom is going bad.#8someone connects to vpn server and recieves ip(i have lease set to only 6hrs...i will change to longer).#10browsers conflicts?has my browser changed from master to none?and since vpn client is xp pro now my networlk temporarily has no master browser and network will not function?at the time this was happening the only pc booted up on my network was the win2k server.any ideas?

Sounds like the MB election is forcing off the DHCP server, try disabling Computer browser in services for all but the Server or set the server "IsDomainManager" to "TRUE" and make sure no other machines are set to this value.

JonO