Problem speeding up NIOS CPU

Just one more thing ...

I did program the SOPC with two clocks ... the 125Mhz (SlowClock) and 150 Mhz (FastClock).

I gave everything in the SOPC FastClock as its input clock EXCEPT the SRAM which I gave SlowClock as its input clock figuring that would generate the necessary clock crossing logic.

Of course, the issue could be something entirely different than the SRAM ... so perhaps the best thing would be to ask if anyone's run a NIOS processor > 125 Mhz with external RAM and how they did it?

Thanks!