A note about WinFax, it does not support mobile telephony as well as the packaging might suggest. It will send faxes, however it would not receive them until I swapped networks (Vodaphone to Orange). Addinfurnightem, a wild stab in the dark type of guess, you may have a problem with the timeout settings. If it is the network timeout, I have no idea, but you could try increasing the values in the Printers properties. Go into Printers folder, right click WinFax, Properties, Details. The defaults are 15 secs for Not Selected and 45 secs for Transmission Retry. Do you get any error codes or messages in your sent items tray?