FileChooser gives same file contents the second time I open the same (updated) file

I'm having an issue with the plugin I'm writing when I attempt to use FileChooser.choosefile() to select the same file (after editing it) a second time. For example, using the code below, if I select a text file with the contents "hello" it will print "hello" to stderr. But if I edit the file to say "hello world" and reopen it with the FileChooser, it still prints "hello". Any ideas?

import com.intellij.openapi.fileChooser.FileChooser;
import com.intellij.openapi.fileChooser.FileChooserDescriptorFactory;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.vfs.VirtualFile;

Project project = e.getData(DataKeys.PROJECT);
VirtualFile file = FileChooser.chooseFile(FileChooserDescriptorFactory.createSingleFileNoJarsDescriptor(), project, null);

if(file != null) {
 try {
 BufferedReader br = new BufferedReader(new InputStreamReader(file.getInputStream()));
 String line;

 // read in lines
 while ((line = br.readLine()) != null) {
 System.err.println(line);
 }
 br.close();
 } catch (Exception e1) {
 PolicyViolationAppComponent.logger.error("Error parsing models");
 e1.printStackTrace();
 }
}