LAN Computers are unable to find path to server ( SBS 2003) folders & files.

Had an ATT modem go bad Wednesday. They replaced it on Friday. ATT tech set up modem in bridge mode. Linksys techs reset the server to obtain ip automatically (rather than the static mode it had been previously set) then reset the router. Everything was working.
 
Sunday, I had to reboot server. When restarted, all computers could still see the internet but now nobody could see our 3 server folders.
 
" This morning I was troubleshooting and went to confirm modem mode. Was getting red internet light on modem which ATT tech says confirms bridged mode. I dont recall changing anything but modem reset to DHCP (I think) and the green internet light displayed. The XP computer wired to the modem could see the internet but no joy for any computer going through the router. Linksys tech helped me reset the router to DHCP and now am back to all computers able to access the internet but no computers can see the server. Computers can ping the server when I enter the server's dynamic IP address.
 
I don't think it is a firewall issue but have shutoff every firewall with no joy. So, am back to server settings? Does SBS have to be in Static Mode with fixed IP address or is Obtain IP automatically OK? Appreciate any help.
LeeGermanAsked:
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Brian PiercePhotographerCommented:
The SBS server should have a STATIC IP and must also point to istelf as the one and only DNS server - make sure that this is the case,

Its better to use the DHCP built into SBS rather than DHCP from the router.
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LeeGermanAuthor Commented:
All right, thank you. Will try to reset to static ip and back at you. Lee
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LeeGermanAuthor Commented:
This did the trick. Still had a very painful hour getting router changed but now everything is working and we are up and running. Thank you very much for quick answer.
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Windows Server 2003

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