Local Declaration "x" hides instance variable xcode warning

I've been have trouble understand this problem. If I change the variable name fifthViewController the error goes away but the view controller doesn't load.

Lost. Once again it's probably something simple.

Thanks in advance.

Here is the code:

{
FifthViewController *fifthViewController = [[FifthViewController alloc] initWithNibName:@"FifthView" bundle:nil];

fifthViewController.transactionID = transactionID;
[self.navigationController pushViewController:fifthViewController animated:NO]; 
[fifthViewController release];
 }