Can't access a sql server 2005 express database application from another computer on a LAN -- HELP ! --

Hello, i've been looking around for a solution to my issue but to no avail ! Here is the scenario: I am using Visual C# 2005 Express Edition and SQL 2005 Express Edition. I wrote a little C# windows application that is using a sql database. I tested it and published it locally and my application works locally, on, in my PC. Now, what i want is to be able to take this application (with all its related files to make it work after publishing) and put it (literally) in a another PC running Server 2003 so that people in my office can use this application from their PC through the LAN. The steps (that come from my readings in various online forums) i have done for that are: - i created a folder on a central PC (the one running Server 2003) and shared it so that users can access the .exe file and the related   .mdf file along with the other linked files. - using SQL Se ...