about component made by user logic

Perhaps I should describe the problem clearly.

Firstly, the Nios could run well before I create a peripheral.

Secondly, the Nios could run well also when I add an IUL which is used to link the Nios and peripheral. Now the peripheral is not embedded on synthesis. Timing is correct.

However, the Nios runs down if I compile the Nios and peripheral togather.

No response when I debug/run the program on Nios. Even "hello world" could not be run on it. I launch FS2 console window and find such instructions of "ldhio gp -16536" at the beginning. I think the point must break down.

I use IDE to debug the codes. Need I make a file of changing the debug options?

Thanks.