[squid-users] squid transparent proxy server: can't access local web server

Hello everyone,
i have a transparent squid proxy server. Here i will try to display
the scheme of networking

Internet -> Router -> Transparent Proxy (linux) -> Clients, Web server

When i try to access web server, no matter from network or internet -
i can't access it and i'm getting error

The following error was encountered:

Unable to forward this request at this time.

This request could not be forwarded to the origin server or to any
parent caches. The most likely cause for this error is that:

The cache administrator does not allow this cache to make direct
connections to origin servers, and
All configured parent caches are currently unreachable.

my squid.conf can be found:
http://pastebin.com/7srNVrxZ

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Regards,
Donatas