FileVault stuck

Greetings! I recently puchased a macbook pro retina 256 GB & during Migration from my old mac, turned on FileVault on my new mac. However, still seeing the following error: Encryption Paused: Connect Power Adapter to Resume Encryption. Power has been on for days and it just never completes and I can't turn it off either. Any ideas on how to to get the to complete? I have about 75 GB of free space. Thanks!