Default [Q] CM11 installed on 4.4.3, network issues

I know there are 100's of forum threads on this but I cant seem to find simple answers that fits my description!

I recently decided to install CM11 on my Nexus 5(4.4.3) with CMs 1 click installer (Swedish tele2 carrier).
It wasn't rooted before i did it.
After some hours i lost network connection and when i restart it doesn't recognize the sim card.
I re-installed cm11, different versions but same thing happened every time.

I'm very low when it comes to this stuff so pls give a simple answer.

thx bro's!