Unlink / cleanup wpfc7_captcha function still denied

Afteran update, I have had issues with the unlink and clean up function up the wpfc7_captcha folder.

I have tried the suggestions from this thread, http://wordpress.org/support/topic/plugin-really-simple-captcha-function-cleanup-unlink-permission-denied?replies=14
as well as this thread
http://wordpress.org/support/topic/plugin-really-simple-captcha-wpfc7_captcha-folder-is-flooded-with-png?replies=7#post-3774329

yet neither work! I have CHmod 077 the wpfc7 folder, I have added the functional patch, i have used tried kate.ussr’ suggestion, nothing has worked. Does anyone have a suggestion? I enjoy using Contact Form 7, but I am at my wit end with this issue.

Thank you.

http://wordpress.org/extend/plugins/contact-form-7/