>>DO U think my modem is corrupted bcoz i am getting those errors ?
No.... It is in good state and that is why you can browse on your phone.... Though not sure about the cable etc.
>>2)how to check modem is good condition or not ? do i need to check "Modem Query" ?
Yes Modem Query is one of the methods by which you can check a modem.... In my opinion it is the best method to check a modem...
After clicking on Query Modem you should get no error message and in the list you will get Command | Respond on the same page you hit Query modem.... So most probably you have not set the correct port for your modem.... Is it Com1 or Com4? i.e Is your modem connected on the USB-Serial Adapter or Com1 and in settings of modem which port is selected???You can check this by Control Panel | Phone and Modem Options | and then Modem Tab.... Is this the same port on which your actual Phone is attached? If No then please change it to the correct port....