my Garmin NUVI 310 can't locate satelites?

My garmin Nuvi 310 came on soon after starting on my vehicle. it's showed perfect and soon after for about few minutes it's stopped tracking because of poor sateilles reception.
Next day doing same thing.

Now what must I do to have it sort out.

Thanks,

vernon Clements
June 2009

I have exactly the same problem on a two year old nuvi, since Xmas 2008. Looking for help.

Mike M
January 2009