I recently switched from using the mono effects loop on my wt800 to using the stereo effects loop. I like the tone this gives me much more. However when I plugged the head into a PA using the D.I. on the back, only the dry, unaffected signal was being sent to the PA. I looked in the manual and made sure that I was using the left return as it says and I am. Nowhere does it say anything about the effects not being sent through the D.I. Any ideas? Note: I usually mic my cab for a lot of the smaller bar gigs I do so it's not a necessity but it would be nice to have the option.