date returned from dateFromString method

date returned from dateFromString method

Please help me solve the problem.
(The values for objValidation.aRange.MinimumValue,
objValidation.aRange.MaximumValue come from web services)
(I am getting wrong dates in firstDate, secondDate.)
NSDateFormatter *df = [[NSDateFormatter alloc] init];
[df setDateFormat:@"MM/dd/yyyy"];
[df setTimeZone:[NSTimeZone localTimeZone]];
NSDate *myDate = [df dateFromString:inputString];
[df setDateFormat:@"MM/dd/yyyy"];
NSLog(@"objValidation.aRange.MinimumValue :
%@,objValidation.aRange.MaximumValue :%@, inputString :
%@",objValidation.aRange.MinimumValue,objValidation.aRange.MaximumValue,inputString);
NSDate *firstDate = [df
dateFromString:objValidation.aRange.MinimumValue];
NSDate *secondDate = [df
dateFromString:objValidation.aRange.MaximumValue];
NSLog(@"myDate : %@,firstDate :%@, secondDate :
%@",myDate,firstDate,secondDate);
[df release];