Hey guys. Color me stupid, but I can't figure out how to get the sub test tone to play on the HK525. I am hitting the "test" button, and it cycles through all of my channels, but it never hits the sub. And yes, the Sub is set to "SUB", as in, "on". I can't even cycle through it manually. I can get the signal to play on DVE, but DVE has messed up LFE test tones. So, can someone please help me out here? Thanks.