Eawy, is not very easy to find what is going wrong.
In any case:
1) you have to be outdoor with a large peace of visible sky;
2) the time of fixing may vary with the position of gps satellites on your had. In one moment fixing would be very fast, (not less of 1.5-2 minutes) two ours leter wuold be very long (also 6 minutes).
3) To fix faster you must be firm.
This is for Italy, but I think also in Europe is the same.
I don't know if in another continent is the same (in Alaska?, in the North Pole?).
Regards.
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