Error: IO_PIN atom "ddr_dqs_to_and_from_the_ddr_sdram[0]" has port DQSUPDATEEN that m

http://www.altera.com/support/examples/nios2/exm-ethernet-acceleration.html

When I try compiling the above project with ep2s60f672c5ES, I see the following error. Any help on how to move further!

Error: IO_PIN atom "ddr_dqs_to_and_from_the_ddr_sdram[0]" has port DQSUPDATEEN that must be connected to the dqsupdate output of a DLL because the dqs_ctrl_latches_enable parameter is set to true

Error: IO_PIN atom "ddr_dqs_to_and_from_the_ddr_sdram[1]" has port DQSUPDATEEN that must be connected to the dqsupdate output of a DLL because the dqs_ctrl_latches_enable parameter is set to true

-Sasi