Windows 7: alcatel x200 usb , error

hello , i have alcatel usb modem and here its pic
http://i.expansys.com/i/b/b182069.jpg
recantly its always blogoff by its self and re blogon ( by its self )
its big problem for me cuz when its blogoff my internet off
this pic from my device manager , its show u the driver of my modem ., but if i start it ( connect internet ) its delet the drivers !! and cut internet then its re install the drivers agine .... and always like that . some time its still connected for a 1hur but most time its cut after i start internet and some time loop beofre i start connecting it
http://www.urstorm.com/ups/uploads/757ac06149.jpg
i wanna tell u also i have speedtesh (another way for me to get connect -adsl )
any help pls with this issu ?
and here is my pc info :

As you're using a USB "Mobile Broadband" dongle, its performance is going to be dependent on the mobile phone network. When traffic on the network is heavy, performance will deteriorate. Also, performance in a large city could be poorer than in a less densely populated area where there are fewer users vying for the available bandwidth (phone or broadband).

thank you mgmcc , its was hardware issu , and i replace it ,. every thing good now,