FTP upload issues - failing because of r/o .lck files

When I check-out a page a .lck file is created on both remote and local

When I check-in the operation fails, the upload of the main page file seems to work fine but then the transaction aborts as it fails to delete the .lck file.

The system doesn't allow me to manually delete the .lck file either have to get the network administrator to delete the .lck file before I can check-in the page.

I can't understand why if I have the right permissions for the system to create the .lck file in the first place on remote why it cannot subsequently delete the file a few minutes later