How to set up DHCP for PXE-boot?

[ronnys]

Hi!
We are trying to get Fog working (Fog: Free computer cloning system)
To get it to work we need PXE-boot from this Fog-server.

As DHCP-server we have it running on a Netware 6.5 SP7. It allready handle out PXE-boot-info to Polycom IP-phones in another Subnet that work fine.
Fog-server is an Ubuntu 9.04 Desktop 64bits.

The only thig the User guide says is to set up DHCP with options
66: IP-address-to-tftp-server
67: Boot-file-name (I only need to enter filename and not the whole path)

Path to boot-file is: /tftpboot/pxelinux.0

Everything seems to be right, but when i try PXE-boot from a Dell Latitude D520 Laptop, i only get;
PXE-T01: file not found
PXE-E3B-TFTP Error file not found
PXE-M0F exiting Intel boot agent

Is not easy to ask about this problem since very few use Netware as DHCP-server. Anyone that had this problem?