cbgm ?

I have just received my MiniMed CBGM and new pump. I have ?’s. My sugars I posted earlier were crazy so I am hoping to get this lil set back fixed. I have hooked up my new pump and I have inserted the new sensor. I thought I entered all the correct info into my pump. Every few min. I get an alarm that states the lost sensor. Do I have it placed in my stomach wrong or I have I just not set up the pump correctly? My Minimed Rep is on vacation for 2 weeks because of the holiday’s. I have called Minimed no help. Please if any one out their could please Help. I would appreciate it!:confused: