How to use Avalon-MM Master BFM?

Hello, I used this code in my test program (in test program i used standart altera_avalon_mm_master_bfm and altera_avalon_mm_slave_bfm submodels), but i have a trouble with using read task.

--- Quote Start ---

    // ============================================================
    // Tasks
    // ============================================================
    //
    // Avalon-MM single-transaction read and write procedures.
    //
    // ------------------------------------------------------------
    task avalon_write (
    // ------------------------------------------------------------
        input  addr,
        input     data
    );
    begin
        // Construct the BFM request
        `BFM.set_command_request(REQ_WRITE);
        `BFM.set_command_idle(0, 0);
        `BFM.set_command_init_latency(0);
        `BFM.set_command_address(addr);    
        `BFM.set_command_byte_enable('1,0);
        `BFM.set_command_data(data, 0);      
        // Queue the command
        `BFM.push_command();
        
        // Wait until the transaction has completed
        while (`BFM.get_response_queue_size() != 1)
            @(posedge clk);
        // Dequeue the response and discard
        `BFM.pop_response();
    end
    endtask
            
    // ------------------------------------------------------------
    task avalon_read (
    // ------------------------------------------------------------
        input   addr,
        output     data
    );
    begin
        // Construct the BFM request
        `BFM.set_command_request(REQ_READ);
        `BFM.set_command_idle(0, 0);
        `BFM.set_command_init_latency(0);
        `BFM.set_command_address(addr);    
        `BFM.set_command_byte_enable('1,0);
        `BFM.set_command_data(0, 0);      
        // Queue the command
        `BFM.push_command();
        
        // Wait until the transaction has completed
        while (`BFM.get_response_queue_size() != 1)
            @(posedge clk);
        // Dequeue the response and return the data
        `BFM.pop_response();
        data = `BFM.get_response_data(0);        
    end
    endtask

Cheers,

Dave

--- Quote End ---

When i use write task address and data proceed from Master to Slave and it can be seen in diagrams in ModelSim. But when i use read task Slave component didn't form readdata in response to adress from Master. I added in read task this code

		`SL.set_response_request(REQ_READ);
		`SL.set_response_latency(0,0);
		`SL.set_response_data('h1234567,0);
		`SL.set_interface_wait_time(0,0);
		`SL.push_response();

but nothing changed, readdata signal is unknown. What am I doing wrong?