Martin ask your ISP to give you latest firmware and software updates for modems. I don't trust firmwares which are available for download under HUAWEI site.
If you upgrade firmware and software then under Vista and 7 you must see your modem and there must be possible to see all files under modem. If you cannot see files in Vista, 7 then filesystem is broken and there will be problems in Ubuntu 9.10 and other distributions where was seen problem with HUAWEI modems.
Martin Wildam wrote on 2010-04-11:
Martin ask your ISP to give you latest firmware and software updates for modems. I don't trust firmwares which are available for download under HUAWEI site.
If you upgrade firmware and software then under Vista and 7 you must see your modem and there must be possible to see all files under modem. If you cannot see files in Vista, 7 then filesystem is broken and there will be problems in Ubuntu 9.10 and other distributions where was seen problem with HUAWEI modems.