application to retrieve location using gps/gprs installed in phone and sending it to the ip address of my pc where database is located.

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C#

.NET

networking

GPS

I am making a mobile tracking application.
I have a gps/gprs in my mobile phone. I want to make an application which will be installed in my phone, which will send the location,time using the gps/gprs installed at regular intervals, to the ip address, port of my pc. I have tried making a client side desktop application which will recieve data from the port and send it to the server which is a web application. My web application is storing the data received in database using sql.
My ultimate aim is to store the imei no.(or some other thing to uniquely identify phone), time and location at that time ,to the database, from where i will retrieve it later and use it for tracking.
I am completely stuck in this problem. Any sought of help will be appreciated.
Thanks in advance.