I recently rean into problems with my internet connection (3g/HSDPA) that I have with Bigpond in Australia. I have a Sierra aircard 880U (USB card modem). I have found that the current version of the driver is v.1.2.10b, modinfo sierra reveils that my current version is v.1.2.5b. The gude on the sierra website says to remove the old version with rmmod sierra before compiling the new one (note: the original version was included in Hardy), bu this just gives me the following result

ERROR: Module sierra does not exist in /proc/modules

Does someone understand what is happening?