install problem french pack on 4.5.1d

[balsamo]

i cannot install the fench language pack in a fresh sugar 4.5.1d install.
there is a message saying :

<<

Could not copy file /var/www/html/2bsolution.com/crm/cache/upload/upgrades/temp/A1tbI3/fr_FR_451/FR_language_install_instructions.txt to /var/www/html/2bsolution.com/crm/./FR_language_install_instructions.txt

>>

what does this mean ?
the file permissions are ok

[balsamo]

sorry my error !
the permissions were not ok...