Permissions when uploading an image

Hi, I have trawled through the countless threads on posting images but still no joy.

I am able to manually upload the images to the wordpress folder however his is done using ftp and with the original domain login details.

I used the install4free option from wordpress and was very happy. A new user was created and i can successfully write posts.

When i try and add an image i get the following message;

The uploaded file could not be moved to /var/virtual/web/w1772/html/wordpress/wp-content/uploads/2007/09.
Warning: Cannot modify header information - headers already sent by (output started at /var/virtual/web/w1772/html/wordpress/wp-admin/admin-functions.php:1990) in /var/virtual/web/w1772/html/wordpress/wp-includes/functions.php on line 1357

\

Also when i try and edit the css through wordpress all files have ths file could be edited if you had write permissions at the bottom. I have opened up the write permissions on the ftp site however i wasnt able to chmod them to 666 i was only able to make themwrite`.

Any assistance is appreciated

Neil