I have files under the child account but when I login as the master I see nothing. Is there some way I can see all the files under my account, children and all? 

When calling ListFolders you need to pass it the full path to the child so it knows which application and child you are looking at, an example would be:

Master Account: mytestmaster

Application: mytestapp

    Child Account #1: childtest1

    Child Account #2: childtest2


First we would log into the account mytestmaster getting a session token.

http://services.nirvanix.com/ws/Login.ashx?username=mytestmaster&appkey=APPKEYABC123&password=mymasterpassword 

Returns: SessionToken - ABC123SESSIONTOKEN123 

Second we need to call list folders passing in the application and path to the child account we want to view:

http://services.nirvanix.com/ws/IMFS/listfolder.ashx?sessiontoken=ABC123SESSIONTOKEN123
&folderpath=//mytestapp/childtest1/&pageNumber=1&pagesize=500

This would return all files / folders in the root of childtest1 under the mytestapp application.  Be sure to include the // to specify this is an absolute path.  Also keep in mind that master accounts have their own unique file systems as well.

Regards,
     Barry R.