Cannot define content directory

Hello. I using an other media server and i want to change with adobe flash media. Today i've downloaded and installed it. But i have configuration problems.

In ams.ini i can change content directory with another one which from local drives. But i can't change directory from network path such as "\\myservername\directoryy\a\b"

Example (working)

Videos in C:\test\a\b\c\myflvfile

VOD_DIR = c:\test

rtmp://localhost/vod/a/b/c/myflvfile

Example (Doesn't working)

Videos in \\myserver\test\a\b\c\myflvfile

VOD_DIR = \\myserver\test

rtmp://localhost/vod/a/b/c/myflvfile

Example (Doesn't working)

Videos in Z:\a\b\c\myflvfile     (In this case Z is network drive -> \\myserver\test)

VOD_DIR = Z:

rtmp://localhost/vod/a/b/c/myflvfile

So i want to play videos from network as my second example. I'm already tried to restart service

thanks inadvance.