POSTing problem with NSURLConnection

[charpi]

Hi all, I have a file in my "Sites" folder called "Boo.rtf", in it only contains the text "Boo". I want to change the text from "Boo" to "Hello World". Here is my code

- (IBAction)press {
    NSLog(@"pressed");
	
	NSURLRequest *theRequest = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://192.168.1.70/~Username/Boo.rtf"]];
	NSURLConnection *theConnection = [[NSURLConnection alloc] initWithRequest:theRequest delegate:self];
	
	if(theConnection){
		theData = [[NSMutableData alloc]initWithContentsOfURL:[NSURL URLWithString:@"http://192.168.1.70/~Username/Boo.rtf"]];
		theString = [[NSMutableString alloc]initWithContentsOfURL:[NSURL URLWithString:@"http://192.168.1.70/~Username/Boo.rtf"]];
		NSLog(@"theData: %@",theData);
		NSLog(@"theString: %@",theString);
		
		NSString *post = [NSString stringWithFormat:@"Hello World"];
		NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding];
		NSString *postLength = [NSString stringWithFormat:@"%d", [post length]];
		NSMutableURLRequest *myRequest = [[[NSMutableURLRequest alloc]init]autorelease];
		[myRequest setURL:[NSURL URLWithString:@"http://192.168.1.70/~Username/Boo.rtf"]];
		[myRequest setHTTPMethod:@"POST"];
		[myRequest setValue:postLength forHTTPHeaderField:@"Content-Length"];
		[myRequest setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
		[myRequest setHTTPBody:postData];
		NSURLResponse *response = [[NSURLResponse alloc]init];
		NSError *error = [[NSError alloc]init];
		
		NSData *reply = [NSURLConnection sendSynchronousRequest:myRequest returningResponse:&response error:&error];
		NSLog(@"reply: %@",reply);
		NSLog(@"replyString: %@",[NSString stringWithCString:[reply bytes] length:[reply length]]);
		}
}

all the permissions and settings for the files had been set to "Read and Write" for "Everyone". Is it necessary to do a chmod? Because right now I am able to access the file and see "Boo" from the replyString, but I'm not able to write "Hello World" onto the file.

Any suggestions?

Thanks alot!