We have 3 servers with netware 5.1 SP6, the clients run on win2k.

Most workstations get their ip-address by way of manual assignment inthe DNS/DHCP management console. Apart from that there is also a pool
ip addresses for automatic assignment.
The problems started when I had to replace a few clients. After
the new mac addresses in manual assignment the clients didn't take
ip-addresses from the manual assignment but they got their addresses from the general pool.
Ipconfig /release at the clients produced a blue screen. After a new start the clients again took their ip-addresses from the general pool,

but not from the manual assignment.

Can anybody help?
Thanks in advance!