gaming headphones and speakers at the same time realtek

Hi i purchased some creative pebble speakers today which have a usb and 1 x 3.5 connecter, i plugged the both in and it worked fine.
I also purchased a razer kracken gaming headset which uses usb.
After setting up the razer thru the razer synapse software successfully, my creative speakers have no sound.
If i look under my sound settings under playback it has my kracken headphones as default and under recording it has my kracken mic as default.
i have the creative speakers plugged into my speaker jack on my front audio as my back audio ceased to work after an realtek HD install.
As i said i can get them both working seperatly , but would like them both working at the same time , any help thanks
Mark
Edit , also if i swap the reaktek Hd audio output to default the speakers work but not the headphones , so they both work , just not at the same time

Windows only allows one default audio playback device. The reason both do not work. If you have the USB headset plugged in and its set (maybe by default) as the audio playback device then its the ONLY playback device. If you have your PC audio "speakers" set as default then the creative speakers will work and depending on what PC sound device you have you may be able to get a standard (not USB) headset to work at the same time. e.g. My Realtek HD Audio manager defaults to mute the speakers when a headset (3.5mm plug) is plugged in. But I have an option to not mute the speakers when I plug in a headset.

I did have it working before before i installed realtek HD manager , ever since is wont work , i also had it working buy using a 3.5mm splitter cable , but now i have usb headphones that option wont work.
I tried uninstalling HD manager and just using drivers but i cant for the life of me figure out how i did it previously.