IPhone FBConnect post to page wall

I need help in topic.

I use GraphAPI. I can post to my own wall with using:

[facebook requestWithGraphPath:@"me/photos" andParams:params andHttpMethod:@"POST" andDelegate:self];

I can post image to group wall using:

[facebook requestWithGraphPath:@"[group_id_here]/photos" andParams:params andHttpMethod:@"POST" andDelegate:self];

But when I try:

[facebook requestWithGraph开发者_运维问答Path:@"[page_id_here]/photos" andParams:params andHttpMethod:@"POST" andDelegate:self];

I have no luck. What's wrong? Thanks in advance