Lowrance 520gps

Thought I read somewhere on here about there being a problem with the 2010 Navionics Hotmaps Premium cards and the 520's.... Anybody know anything about this??? I bought another boat awhile back that has 2 Lowrance 520's on it... I already had an aluminum boat with a 522 on it that I was using for crappie fishing. The 522 had alot of waypoints on it so I switched it with the 520 on the bow. The Navionics card works good in the 522, but when I put it in the 520 at the console, it does not give me the option to choose "North Georgia, South Georgia, North Florida," etc...And it doesn't show anything different than what is on it without the chip in...Any ideas???

Update the 520, should cure the prob.

Will do...Thanks!!