Hi all.
Im a complete muppet when it comes to how vodacom etc works, but hopefully someone can point me in the right direction!
I have a vodacom K4505-z HSPA+ USB stick, that I use with a pre paid sim card. I loaded 2 gigs of data.
Im using windows vista business with office 2007 my GF uses vista home premium both machines do the same thing.
The card connects to the internet, but after about 5 to 10 minutes the computers "network and sharing centre" says Im on local only, and I cant check mail or do anything online
The vodaphone program says Im still online, downloading at around 64 bps and uploading at 3.8kbps

To get back on again I have to restart the vodaphone program which is a real PITA
Ive gone through all the settings I can find, and there is nowhere that tells the connection to close.
I also connect my sony erricson 702 on MTN, through a data cable and it works perfectly.

Any advice would the hugely appreciated.