Advanced Guestbook 2.3.1 error

i keep getting this error when i test out the script:

Warning: unlink(index.html) [function.unlink]: Permission denied in /net1/autkast/guestbook/lib/add.class.php on line 80
Guestbook
Thank you for signing the guestbook.
Your entry was added successfully! You should be transfered back to the guestbook in 2 seconds.

Powered by Advanced Guestbook 2.3.1

help??

Hi i had the same problem, but you can make it work by doing this in your ftp program.
I have bulletproof ftp wich i use to upload my stuff, i logged in at my ftp server and i did rightclick with the mouse on the map public and tmp, then i did, Change Attributes, there i replaced the number 750 to 777 and now it works fine for me

I hope it will work also at your ftp,
Greets Da Rude.