Web Forms :: Error While Uploading A Picture?

I build a website with management system. In the management pages, I can upload pictures to a specific folder in my website. While doing it in my localhost in works perfect. While doing it on the hosted site, I get: A generic error occurred in GDI+. I read a little bit about it, and relized that it is probably an authorization problem. I asked the hosting to let a iusr_xxx permition to that folder. I've just informed now that it was done. The problem still occures. Here is the problematic code. It falls on the save command:

using
{
bitmap.Save(MapPath("../images/lawyers/" + fileName), image.RawFormat);
}

I tried already to put GC.collect(); after this line and alse I tries bitmap.Disppose() after this line.