[opencms-dev] Problem with <cms:contentload>

[Ashutosh]

Dear all,

Please resolve my Problem as 

When ever i want to get a list of XML resource of a folder with using ---
   
   <cms:contentload collector="allInFolder"  
        param="/sites/default/XMLGAME/" editable="manual">

Error Occurred when run these file as  : 

    "ErrorThe collector parameter "/sites/default/XMLGAME" is malformed. "


I cannot get the reason for this problem ,So i requested to you 
all ,please help me to resolve such type of problem

Regards 
Ashutosh