Using alternative return

Hi All

At the moment I'm using headphones playing along with backing tracks from the laptop, I'm using a1/8 jack split to 2 x 1/4 inch jacks into the Return and alternative inputs, works great! I then tried to connect the main outs to each of my Yamaha power monitors giving me the option to use headphones or external sound source but I couldn't make it work! Any ideas why this is?

I've checked Aux an main out, it's probably not possible due to the use of the alternative return, I guess!!

I don't think I had any loops activated but I'll have another try

thank you

No nothing, just coming through headphones, turn loops off, still not working tried the following:
Aux mains volume nothing, master as well, main output nothing, strange!

thanks guys it's workin now, I'm officially a dickhead I somehow got the cables mixed up!

Thank you