Problem keeping my internet connection active

[Guest_imported]

About us:
Small charity recently acquired a server.

Sytem info:
BT Router
Windows 2000 Server
DNS installed
DHCP installed
Routing and Remote Access installed
Active Directory installed
Windows XP Client

Problem:
On client machines we keep losing internet access but
don't understand how to resolve problem properly

Current solution:
Disable and Enable LAN network connection
This only resolves the problem temporarely, sometimes
five minutes, sometimes longer.

Questions:
Due to the current lack of knowledge I don't know how to
troubleshoot this problem. Any hints or solutions would
greatly appreciated and if you live close enough we'll
buy you a beer.

 

[Flagg]

Does your server lose access to the internet as well?

 

[JanKonijnenberg]

No my server does not lose access and as far as I understand this is because it uses a fixed IP address

 

[brontosaurus]

OK, so then you're not really losing internet access. Your clients are periodically unable to resolve internet addresses, it sounds like. When this happens, can the clients still see each other internally?

 

[JanKonijnenberg]

Sorry internet access goes down as well

 

[JanKonijnenberg]

yes i can ping other clients

 

[brontosaurus]

OK, then reverse that Internally , you're good. It's the internet connection to the server, specifically the router, that's dropping you. Have you contacted your ISP?

 

[JanKonijnenberg]

brontosaurus please contact me direct at jan_konijnenberg@hotmail.com

cheers