Unable to delete files using Gene6 FTP

[globalaccess123]

When I setup a new domain in Plesk, Plesk creates a corresponding FTP user account in Gene6 FTP server. However, the user account that is created does not have permission to delete FILES in the folder httpdocs. It's possible to delete folders in httpdocs, but not files. A temporary solution would be to create a user account directly in the Gene6 FTP program, but since I now have resellers, they want Plesk to be able to handle this without correcting the FTP user account manually afterwards.

Has anyone else had this problem, and does anyone have a step-by-step solution to this issue?

Hoping for an answer.