Trouble installing my pole on my cement ceiling

I'm having trouble installing my StudioVeena pole by Lil Mynx onto my cement ceiling. I had to purchase a different drill bit to drill the hole into the cement ceiling.  Now that I have the hole, I feel like the screw won't go in. It did go in a little bit but then I felt like it wasn't really going in anymore and I'm afraid I might just be stripping the whole. Did anyone have this problem? I'm not sure what else I should do.