DHCP not handing out addresses

Users are not getting IP addresses through DHCP.  Our small company has the DHCP server with 1 scope set up on a file/print server.  We've installed DHCP server on the DC and are ready to half the scope and put 1 half on the DC.  We also have collision detection set up on both DHCP servers.  Any other ideas or thoughts on solving this issue?
DDJCapAsked:
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Chris DentPowerShell DeveloperCommented:

Is the DHCP server authorised? In the DHCP console, right click on the "DHCP" level and select Manage Authorised Servers.

Chris
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DDJCapAuthor Commented:
The file/print server was and is authorized.  Once we split the scope into 2 and put half on the DC we'll authorize the DC as well.  DNS is also running on both servers.  We are not running WINS
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Chris DentPowerShell DeveloperCommented:

Is the file and print server handing out addresses correctly at the moment? Authorisation is required before the server will begin serving clients.

All of this happens before DNS, or WINS, or really anything else gets a hand in. The client will send a broadcast for an address, it's simply up to the DHCP server to respond. If multiple servers are configured then both will respond, the client will use the first reponse it receives.

Chris
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DDJCapAuthor Commented:
The DHCP scope is set, the server authorized, and DHCP Server service runs automatically.  When users reboot, they are getting 169.254.....IP addresses.   How do we otherwise KNOW/TEST if the file/print server is handing out addresses correctly?  
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Chris DentPowerShell DeveloperCommented:

You'd have to monitor network traffic. I'd expect it to throw errors in the Event Log if it's not behaving itself though.

It would be wise to double check the scope, including subnet mask and other items.

Chris
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DDJCapAuthor Commented:
I checked the system logs under Event Viewer.  I have "The DHCP service encountered the following error while cleaning up the database:  %1"  According to MS, either the path to the DHCP server DB is gone or it's corrupt.

I verified the path led to dhcp.mdb, so I stopped DHCP, ran  jetpack dhcp.mdb tmp.mdb reconcile, then restarted DHCP services.  
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Chris DentPowerShell DeveloperCommented:

Great, is it still failing to respond or did that catch it?

Chris
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DDJCapAuthor Commented:
I've tried it out on 1 PC so far.  I logged into it locally for a video conference, then released and renewed the IP address.  No luck.  Tomorrow morning, I'll try it again on other PCs and see if this works.
If not, you'll be hearing from me.  Thanks to all who've lent their expertise so far.
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DDJCapAuthor Commented:
After running the jetpack on the DHCP server DB, I set my PC to DHCP and rebooted.  No luck.
I deactivated the DHCP scope and unauthorized the DHCP server.  On the DC, I replicated the scope with all exemptions and reservations.  I then activated the scope and authorized the DHCP server.  I changed my PC configuration to DHCP and rebooted.  Even though my PC was one of the reservations, I still did not get an IP address.  
I have verified teh DHCP server(s) have a static IP address, both have DNS entries, both can be pinged via IP and name, have stopped and restarted DHCP services, and checked scope options
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DDJCapAuthor Commented:
We have a solution:   The Network Threat detection from Symantec Endpoint 11.
Once we disabled it on the DC, all was kosher.
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