Denon AVR-1505 Audyssey problem

Hello there
i have recently bought a denon avr-1505 with Onkyo sks-ht51 speakers (5.1)

i have done the calibration set up with the microphone and set up the Audyssey feature, but it seems to lose it's calibratrion/memory. . last night i watched a film in DTS and geberally i have the Audyssey EQ turned on, but as i was watching the film i noticed the little green light was off, i pushed the audyssey button on the remote and it said 'run audyssey' as if i need to calibrate it again???

this has happened twice now, i have calibrated it twice, now i'm getting to the point where i'm thinking does DTS affect audyssey in some way? is my amp screwed? i leave it on standby mode when i'm not using it so power is always on..

help!

it's ok i've solved it now

it turns out that i have 3 Quick Select buttons on the top of the remote and when i use this instead of the input source select button it removes all the Audyssey EQ stuff..

so i've simply restored it to last calibration and now i'm avoiding the quick select buttons like the plague..