small help with red5 settings

I just installed fresh RED5 1.0 RC today. Everything works fine. I put a few .flv files into /webapps/vod/streams directory. Tried to get a stream from them and find out that just certain filenames working. To make sure it's not a file issue, I made a few copies of default [login to view URL] file into different names: [login to view URL] - works [login to view URL] - works [login to view URL] - ERROR: Closing connection: [login to view URL] [login to view URL] - ERROR: Closing connection: [login to view URL] the only difference is filename - otherwise it is the same file. Are there any special settings to block certain names from playing? I am really puzzled. Ready to pay some $$ for help!