Problems deleting folders it install phpbb

[derrickmehaffy42]

I am trying to installed over a corrupt version of phpbb. This is the problem log from filezilla
"Status: Retrieving directory listing...
Command: CWD styles
Response: 550 styles: No such file or directory
Error: Failed to retrieve directory listing
Command: CWD /public_html
Response: 250 CWD command successful
Command: DELE styles
Response: 550 styles: Is a directory
Status: Retrieving directory listing...
Command: TYPE I
Response: 200 Type set to I
Command: PASV
Response: 227 Entering Passive Mode (69,175,122,178,138,30).
Command: MLSD
Response: 150 Opening ASCII mode data connection for MLSD
Response: 226 Transfer complete
Status: Directory listing successful"

I can not delete them, i have relogged and refreshed. Can not delete them