The problem is that I install the modem, and then, after using it normaly for 1 or 2 days, it just un-installs (I realize it when I start windows and uselessly try to connect). Besides, I have the "common" problem with the "PCI Communication Device (Code 28)" for the modem. ¿How can I solve this? Thanks in advance

PD: There's no problem when connecting and being in internet, it works right.