iControl accepts new connections when FORCED OFFLINE

Thanks, that does make some sense. Here's my Disable-Member function. Where do you think I should add the required parameters to make it forced offline?

function Disable-Member()
    {
        param($pool_name, $member);
        $vals = $member.Split( (, ':'));
        $member_addr = $vals[0];
        $member_port = $vals[1];
        Write-Host "Disabling Session Enabled State...";
        try{
            $MemberSessionState = New-Object -TypeName iControl.LocalLBPoolMemberMemberSessionState;
            $MemberSessionState.member = New-Object -TypeName iControl.CommonIPPortDefinition;
            $MemberSessionState.member.address = $member_addr;
            $MemberSessionState.member.port = $member_port;
            $MemberSessionState.session_state = "STATE_DISABLED";
            $MemberSessionStateAofA = New-Object -TypeName "iControl.LocalLBPoolMemberMemberSessionState[][]" 1,1
            $MemberSessionStateAofA[0][0] = $MemberSessionState;
            (Get-F5.iControl).LocalLBPoolMember.set_session_enabled_state( (, $pool_name), $MemberSessionStateAofA);
        }
        catch 
        {
            Print Error message if the pool does not contain the pool_member
            [string]$i="ERROR: The requested pool member does not belong to the specified pool name. Please provide valid pool and its member.`n" 
            write-host $i -foregroundcolor "yellow"
        }
        Write-Host "Waiting for current connections to drop to zero..."
        try{
            $MemberDef = New-Object -TypeName iControl.CommonIPPortDefinition;
            $MemberDef.address = $member_addr;
            $MemberDef.port = $member_port;
            $MemberDefAofA = New-Object -TypeName "iControl.CommonIPPortDefinition[][]" 1,1
            $MemberDefAofA[0][0] = $MemberDef;
            $cur_connections = 1;
            while ( $cur_connections -gt 0 )
            {
                $MemberStatisticsA = (Get-F5.iControl).LocalLBPoolMember.get_statistics( (, $pool_name), $MemberDefAofA);
                $MemberStatisticEntry = $MemberStatisticsA[0].statistics[0];
                $Statistics = $MemberStatisticEntry.statistics;
                foreach ($Statistic in $Statistics)
                {
                    $type = $Statistic.type;
                    $value = $Statistic.value;
                    if ( $type -eq "STATISTIC_SERVER_SIDE_CURRENT_CONNECTIONS" )
                    {
                         just use the low value.  Odds are there aren't over 2^32 current connections.
                         If your site is this big, you'll have to convert this to a 64 bit number.
                        $cur_connections = $value.low;
                        Write-Host "Current Connections: $cur_connections"
                    }
                }
                Start-Sleep -s 1
            }
        } catch {
                Print Error message if the connections cannot be dropped
                [string]$i="ERROR: The specified pool member was not found.`n" 
                write-host $i -foregroundcolor "yellow"
            }
        Write-Host "Disabling Monitor State...";
        try
            {
            $MemberMonitorState = New-Object -TypeName iControl.LocalLBPoolMemberMemberMonitorState;
            $MemberMonitorState.member = New-Object -TypeName iControl.CommonIPPortDefinition;
            $MemberMonitorState.member.address = $member_addr;
            $MemberMonitorState.member.port = $member_port;
            $MemberMonitorState.monitor_state = "STATE_DISABLED";
            $MemberMonitorStateAofA = New-Object -TypeName "iControl.LocalLBPoolMemberMemberMonitorState[][]" 1,1
            $MemberMonitorStateAofA[0][0] = $MemberMonitorState;
            (Get-F5.iControl).LocalLBPoolMember.set_monitor_state( (, $pool_name), $MemberMonitorStateAofA);
            Get-PoolMemberStatus $pool_name $member
        } 
        catch {
            Print Error message if the status cannot be set
            [string]$i="ERROR: The disable status could not be set. `n" 
            write-host $i -foregroundcolor "yellow"
        }
    }