web interface error - configure Nagios first time

[vanaidu2004]

Hi,
I'm trying to configure Nagios in Solaris server. Installation hurdles are passed, but facing issues with web interface. I'm getting the below error when i try to open http://localhost/nagios and http://localhost/nagios/cgi-bin

Error In Firefox -- You don't have permission to access /nagios/cgi-bin/ on this server & You don't have permission to access /nagios/ on this server
In IE if i use http://192.168.1.1/nagios/ i'm getting the page but only "Home" & "Documentation" buttons are visible at the left side pane and some garbled text appears in the page. If i use http://192.168.1.1/nagios/cgi-bin/ i'm getting the error "This website requires you to log in"

My web configuration file for nagios looks like below. I've created passwd using htpasswd command, still i'm getting permission issue.
---------------------------------------------------------------------------------
ScriptAlias /nagios/cgi-bin "/opt/local/nagios-3.3.1/sbin"

<Directory "/opt/local/nagios-3.3.1/sbin">
# SSLRequireSSL
Options FollowSymLinks
DirectoryIndex index.php index.html
Options ExecCGI
AllowOverride None
Order allow,deny
Allow from all
# Order deny,allow
# Deny from all
# Allow from 127.0.0.1
AuthName "Nagios Access"
AuthType Basic
AuthUserFile /opt/local/nagios-3.3.1/etc/htpasswd.users
Require valid-user
</Directory>

Alias /nagios "/opt/local/nagios-3.3.1/share"

<Directory "/opt/local/nagios-3.3.1/share">
# SSLRequireSSL
Options FollowSymLinks
Options None
AllowOverride None
Order allow,deny
Allow from all
# Order deny,allow
# Deny from all
# Allow from 127.0.0.1
AuthName "Nagios Access"
AuthType Basic
AuthUserFile /opt/local/nagios-3.3.1/etc/htpasswd.users
Require valid-user
</Directory>
-----------------------------------------------------------------------------------

Need your expertise to resolve the issue. I'll post if any of the other config information is required.

Many thanks in advance.