A question about uploading

I hope someone can help me here because I have looked through all the "how to's" and guides, and even sent a message to the "contact us" with no luck. Ok, on to the question. Is there some sort of grace period were you need to be here for a certain time to start uploading? Or is there a waiting period for stuff you submit? I tried to upload a trailer and some pictures but can't seem to get them uploaded. It acts like it is uploading, but then goes to a blank screen. When I check to see if they have been uploaded, the answer is no. Am I doing something wrong, or what? Any information would be helpful.Thanks in advance.MKTavarez