facebook upload photo along with description and caption in iphone -

i want upload image facebook. upload photo along caption. want upload description

i tried adding key "description" dictionary. didn't work.

is possible upload description well?

following code using..

- (void)posttowall {      fbrequest *uploadphotorequest = [fbrequest request];      nsdata* imagedata = uiimagejpegrepresentation(saveimage, 1.0);      uiimage  *image_  = [[uiimage alloc] initwithdata:imagedata];       fbpermissiondialog* dialog1 = [[[fbpermissiondialog alloc] init] autorelease];     dialog1.delegate = self;     dialog1.permission = @"photo_upload";     [dialog1 show];      nsmutabledictionary * params = [nsmutabledictionary dictionarywithobjectsandkeys:                                     @"hey!!!!!!", @"caption",                                     @"i own it..", @"description", //this didn't post description..                                     nil];       if (nil!=image_)         [uploadphotorequest call:@"photos.upload" params:params dataparam:(nsdata*)image_];      nslog(@"image uploaded");      [image_ release]; } 

have @
http://www.raywenderlich.com/1488/how-to-use-facebooks-new-graph-api-from-your-iphone-app