Java service can't list files in directories

I'm doing a Windows Service in Java, this service list the files in a directory and write the results in a file. My problem is that when i call Java.File.isDirectory() when the service is running it 开发者_如何学Goalways results false (It works well when i run the service manually as any other program). Besides, if i try the following: for(File F : directorio.listFiles()) trows an exception when i run the program as a service. I believe is permission related, because when i change the account in which the service is running to my own credentials it list the files correctly. Do you know if there is a workaround? (Change a windows policy, another kind of special account, another way to list the files of the directory, any other thing maybe i'm missing). Thanks in advance.

Give the user the Java service is running under, the needed credentials to the folder in question.

I belive it runs as SYSTEM.

Thanks for all your help! I found my problem, i was reading the path from a configuration file which i assumed to be in the user's home (my home and System's home are not the same... my fault). Unfourtenly i didn't realize that because i was using a recycled class (:S). Again Thank you very much.