Huawei e220 is suddenly no longer recognised on mac 10.6

Hi guys,
I've tried all the solutions i can think of concerning my current problem. I've upgraded to Snow Leopard for almost 2 months now and my Huwaei e220 usb modem has been working fine although i have to admit, slower than when i was running Leopard. All of a sudden both my MacBook Pro and Mac mini do not recognize the modem anymore. The modem does not even blink. I've tried all ports on my mac, have installed and uninstalled both the vodacom software(my network carrier in South Africa), and have also tried the modem on a windows XP computer and Vista computer but to no avail. None of the computers pic up the modem. Have also called Vodacom and they concluded i should check my computer. All the ports on my Macs are fine as they pick up all my other devices.
So am asking, has anyone had this issue, if so, did you manage to find a solution. Am just dreading the thought that my only option might be to purchase a new modem and I really need connection now as am completing my postgrad with heavy research over the internet.
I just thought to post this as a last option in case someone has had a similar problem. Any help or advise you can give will be greatly appreciated.
Many thanks as i wait in anticipation of your responses.
ike1851

Hey K T, thanks for the reply. I actually got a new one the same day. I inquired at Vodacom in South Africa here and they confirmed that the modem had packed up. It could be repaired but the cost will be almost as buying a new one so i got a new one. I originally thought it was something to do with my Mac and of cause was trying to see if I could avoid buying a new one.
Thanks again.
Cheers.
Ike1851

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