How to configure DDR SDRAM on NEEK

Hello everyone:

I had built a simple system on NEEK with SOPC.When I ran the hello world program on NIOSII IDE,no error or warning.But "Hello from NiosII" didn't show in the console window.While I changed the Program memory,Read-only data memory ,Read/write data memory ,Heap memory and stack memory in "System Library properties"of NiosII IDE from DDRSDRAM to SSRAM which is included in my system,the Hello world program could work.

When I compile the system in quartus ,the .sof file is time-limited due to the DDR SDRAM ip.

So I am confusing about which part causes the problem.the ip or the configuration of DDR SDRAM.

My English is not very good,and thank you for check my problem.