ColdFusion writing to shared folder on different computer

I have a process that has ColdFusion write to a shared folder on a computer that is not processing the request.  When I attempt to refer to the share using the UNC name '\\SERVERNAME\FOLDERNAME\test.txt', ColdFusion throws the following error:

Error occured while performing write: java.io.FileNotFoundException: \\SERVERNAME\FOLDERNAME\test.txt (Access is denied)

ColdFusion has full access to this folder.  However, when I refer to the folder/file locally 'c:/temp/test.txt', ColdFusion has no problem with creating/writing the file.

Is there an issue writing to shared with ColdFusion?

ColdFusion version: 9.0.1

OS: Windows Server 2008 R2