$answer = <$soc>;

##</code><code>##

$answre = <$socket>;

##</code><code>##

while ($new_sock = $listener->accept()) 
#now you just stuck in this loop
{
    while (defined ($buf = <$new_sock>))
    #where do you reply to your client, start from the second client?  
    {
        print FILE "$buf";                         
    }
    close FILE;
}