Driver for usb modem

Windows recognize new hardware and after clicking on ¨This Computer¨ there appears an external disk (D 
I click on it and I get an alert ¨Insert a disc into drive D¨
In Device manager I see under DVD drives or CD-ROM : HUAWEI Mass Storage USB Device with an exclamation mark.

I was trying this small thing on Mac, where it was found as a new medium without problem. I remember using this modem on my laptop with windows xp and it was working. Why it is not working on my father's laptop?

Try here for the drivers http://www.wireless-driver.com/huawei-e1550-hsdpa-datac...