Metasploit Meterpreter--> Acces is denied

I succeeded in obtaining a meterpreter session with my other computer but when I was searching through the Directories by using the commands cd and ls everything went according to plan untill I came across "My documents". I could use cd My documents and it worked out but when I tried "ls" afterwards it gives me: stdapifsls: Operation failed: Acces is denied.

Does anyone know how to solve this problem?