Advice on insertion.

I started with the MGX a few years ago and now I use the Helix syn and I love it. I bought the Vice but I can't get it in. It is too big. I have tried like 10 times with no success. I use the KY gel. Should I try something else? I have even had the Helix in for a while then try and switch to the Vice. No luck. It will not go in.