That won't help.
Please speak to your web hosting provider. Ask them if they are using a CGI wrapper such as 'suexec' or 'cgiwrap'.
Chances are that they are doing so, but are not operating PHP in a similar matter. When it tries to set permissions on a file it needs to, it can't because the ownership is incorrect.
If your host is unable to resolve the issue, you will be unable to use the Accelerator.
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Charles Capps
Programmer, Infopop Corporation
Please do not contact me privately for support - post on the board or open a support ticket instead!