If these are larger than your php.ini will allow it will set them back to what the max is in php.ini. You'll want to check and see what the upload_max_filesize is set to. It sounds like it might be set to 0.
Thanks, when I attempt to set values, the system indeed sets values back to zero. The instructions say
If file attachments are enabled in the forum, this dictates how large each file attachment can be. Max size set in php.ini is 4194304 so you may not exceed this size.
I found my "php.ini" and the "upload_max_filesize" variable is set to 4194304.
Also, all permissions are properly set and "OK"
But....still doesn't work !!