Multithread UDP Listener in C# 2008

Hello to every body.
My name is Christian and i´m not a c# developer (I´m a VFP developer) but some how i manage to built a little UDP server listener app in c#.
I needed to do this becouse I will have several vehicles that send a data via GPRS to the server each minute and the server should be listening and decode the data to store in the database (MySql). There will be hundreds of entries per minute. I Hope that somebady can tell me if my code is multithread or not and if it´s not, how can i implement it. Also, if i need multithread in the database part. The source code is in this link:

http://www.mediafire.com/file/kze3zz...ttprequest.rar