No idea. Some tips:

1. supl* server is helping only if you have Internet connection (right?). It downloads the data which would otherwise be downloaded from satellites themselves (taking up to 15 minutes to do so).

2. Cloudy day, lots of buildings (or mountains) reflecting the signal in zigzag -ing multi-path all make GPS fix slower. Straight-line to satellite is best.

You could try using supl.nokia.com , maybe.

Thank you. Best wishes.