Do you mean MEP 15 or MEP 2015 - if 2015 please use this version number to avoid confusion with MEP 15 which is still used by some members.
Check the programs settings Video/Audio tab that you have the Import video with sound option checked.
Also be aware that some mobile phone videos do not strictly follow the standards and may cause issues with variable framerate video or non standard audio bitrates.
Note: as Alan says, installing all-in-one codec packs can fix a lot of audio problems however the video codecs may result in inferior results when exporting video and are installed at your own risk.
Thanks for your answers. I have the Import with Audio option ticked.
It imports the Video but with no sound.
When the clip is moved to the editing area and I click on the Audio icon an error message is returned saying. There is no Audio object attached to this video.