Problem looking up internal web servers

Hi All,

I know it's something I probably missed somewhere in the squid.conf, but

here is the question:

When I try to access an internal web server, my browser gives the
follwoing message:

ibihp1.interaccess.nl: No address associated with name

The server ibihp1 is up and running with Apache (I checked, by using no
proxy).

The excerpts from my squid.conf:

cache_peer gw.interaccess.nl parent 80 0 no-query no-digest
no-netdb-exchange
default #
Firewall definition
.
.
acl all src 0.0.0.0/0.0.0.0
acl manager proto cache_object
acl localhost src 127.0.0.1/255.255.255.255
acl ia-br src 172.16.1.28/255.255.255.255 # ia-br is
the squid server
acl SSL_ports port 443 563
acl Safe_ports port 80 21 443 563 70 210 1025-65535
acl CONNECT method CONNECT
acl intranet dst 172.16.1.5/255.255.255.0 # My
internal DNS server
always_direct allow intranet
.
.
append_domain .interaccess.nl

I don't want to be using the the option from my browser (because then I
would have to alter 500+ users their browsers).

I noticed that internal web-servers specified in our Firewall (we use
VPN) are accessible.
Also our DNS server is specified in the /etc/resolv.conf.

Can anyone shed some light on this?

Regards,

Richard.