Facebook iPhone api, feeds

Question

Hello guys!

Is there a way to remove the "userMessagePrompt" ? I paste my code to publish a feed:

FBStreamDialog* dialog = [[[FBStreamDialog alloc] init] autorelease];
dialog.delegate = self;
dialog.userMessagePrompt = @"";
dialog.attachment = [NSString stringWithFormat:@"{\"name\":\"%@ AppName!\","
                     "\"href\":\"link\","
                     "\"caption\":\"Get AppName for iPad!\","
                     "\"href\":\"link\"}],"
                     "\"properties\":{\"More info\":{\"text\":\"AppName\",\"href\":\"link\"}}}", text];
[dialog show];

It works, however I don't want to show the userMessagePrompt. If I set to nil or to empty string then it shows the default text. But I don't need it, neither the textinput under it.

Maybe can you help me?