I have a BIG problem.
When users are trying to login, they can use the IPX/SPX but they cannot use the TCP/IP protocol.
When I run WINIPCFG and choose the correct networkadapter, I get an IP adres, but my subnetmask is 255.255.0.0, this is not good. It should be 255.255.255.0. But every morning the users have to run WINIPCFG and choose "renew all" and then the subnetmask is being changed correctly.
How can I solve this problem, so the subnetmask is already good without doing the step "renew all" every morning?

Thanks in advance.