problems with access lists

Hello,
i've a problem to define an access list room3 which have to include a range of ip-addresses.
Although the access for room3 should be restricted in time and day it's denied always.
Quite simple i guess but in my squid.conf it doesn't work! So what's wrong? Maybe the syntax?
My Squid Ver. 1.0.22 runs on a Linux system.

Here is an extract of the squid.conf:

acl manager proto cache_object
acl localhost src 127.0.0.1/255.255.255.255
acl all src 0.0.0.0/0.0.0.0
acl SSL_ports port 443 563
acl CONNECT method CONNECT

# IP-addresses are changed!!! just examples!!!
acl room3 src
192.168.99.60/255.255.255.255-192.168.99.80/255.255.255.255
# i've also tested: 192.168.99.60-192.168.99.80/255.255.255.255
acl nt_bn1 src 192.168.99.201/255.255.255.255
acl nt_bn2 src 192.168.99.5/255.255.255.255

# Times
acl zeit time T 15:25-15:30

# Protocols
acl ftp proto FTP

# Allowing or Denying access based on defined access lists
http_access allow room3 zeit
http_access deny room3 !zeit
http_access allow nt_bn1 nt_bn2
http_access deny !nt_bn1 !room3 !nt_bn2

icp_access deny all

http_access deny manager !localhost
http_access deny CONNECT !SSL_ports
Received on Thu May 22 1997 - 14:49:45 MDT