cocoa - Incompatible pointer type with NSDate -

i can't see why doesn't work. following code block throws warning @ addobject line: "passing argument 1 of 'taskwithtext:duedate:' incompatible pointer type"

    - (id)init{             self = [super init];             if (self) {                 tasklistarray = [[nsmutablearray alloc] init];                 [tasklistarray addobject:[afltask taskwithtext:"@helloski" duedate:[nsdate datewithnaturallanguagestring:@"12/31/12"]]];             }             return self;         } 

it's simple don't see why doesn't work. seems match method:

- (id)initwithtext:(nsstring *)newtext duedate:(nsdate *)newduedate{     if(self = [super init]){         tasktext = [newtext retain];         taskdue = [newduedate retain];         taskcompleted = no;     }     return self; }  + (id)taskwithtext:(nsstring *)newtext duedate:(nsdate *)newduedate{     return [[[afltask alloc] initwithtext:newtext duedate:newduedate] autorelease]; } 

what going on here? i'm pretty new objective-c (but not programming in general) , i'm still trying wrap head around pointers -- shouldn't work?

you're going kick yourself:

"@helloski" 

should be

@"helloski"