problem installing phpweather

[<pe...@ma...>]

hi there, I've install phpweather on my machine (MaosX runing mysql) at 
home and everything works fine no problems. When I try to install it 
onto a server where my website is hosted it gives me an error :

Warning: Supplied argument is not a valid MySQL result resource in / 
path on the server /phpweather.inc on line 428

line 428 is: if (mysql_num_rows($result)) { /* found station */

any clues what the problem might be?

thanks very much.

G.