no connection to tablet ( nexus10 ) via usb

I want to establish a connection to my tablet via usb cable for file transfer. The tablet is recognized on my notebook with Antix, but I can t open the folders, because error code says that I dont have permission for that and that I ve to give permission to that first.
On my tablet there aren t any restrictions in that way so I don t know what to do. With my desktop pc, running with lubuntu linux, I don t have that probs.
I dont have this probs when connecting my smartphon ( samsung S3 mini ) to the notebook for filetransfer.