i've been using a sierra wireless t-stick from telecom for the last few weeks, it works alright but seems to be crashing an awful lot the last couple of days. I have to use ctrl-alt-esc to bring up the task manager thing to close it, then restart it. would anyone know why?

also sometimes it has a ref flashing light, or constant red light (like now), and sometimes the light flashing is blue or a constant blue, does anyonw know what the different coloured lights mean?

thanks.