NSXMLParser cannot parse special characters (German and French)

I am working on an application that does a search on a private server and shows results for the user. The problem is that NSXLParser cannot parse special German and French characters. For example: it should be: (Geschäftsführer) → what I get: (äftsführer)

How can i fix this?

here is my code:

- (void) parser:(NSXMLParser *)parser foundCharacters:(NSString *)string
{
    currentNodeContent = (NSMutableString *) [string stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
}

- (void) parser:(NSXMLParser *)parser didStartElement:(NSString *)elementname namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict
{
    if ([elementname isEqualToString:@"results"])
    {
        currentJob = [SearchResult alloc];
    }

}

- (void) parser:(NSXMLParser *)parser didEndElement:(NSString *)elementname namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName
{


    if ([elementname isEqualToString:@"jobTitle"])
    {
        currentJob.jobTitle = currentNodeContent;
    }

    if ([elementname isEqualToString:@"location"])
    {
        currentJob.shortAddress = currentNodeContent;
    }

    if ([elementname isEqualToString:@"companyName"])
    {
        currentJob.employer = currentNodeContent;
    }

    if ([elementname isEqualToString:@"results"])
    {
        [self.jobs addObject:currentJob];
        currentJob = nil;
        currentNodeContent = nil;
    }
}

Any help would be much appreciated ... Thanks in advance