>Are you referring to IIS security or code-access security?

Well, basically, I'm not sure presently where I should look to resolve the issue. What I know is that when I run this from http://localhost, it works ok. It can access the dbf from the OLEDBAdapter command. But, on the server, it cannot create a reference to the object. The directory where the Web Service is executed seems to have the same rights as any other Web Services I have built before. However, this is the first time I am accessing some data from it as usually I only use it as a wrapper.