Problems with installing Innovation plugin + sitemap generation error

[Sheridan]

GetSimple Version
GetSimple Version Unable to check. Your version is 3.0
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Server Configuration
PHP Version 5.2.17 - OK
cURL Module Installed - OK
GD Library Installed - OK
ZipArchive Installed - OK
SimpleXML Module Installed - OK
Apache Mod Rewrite Installed - OK

For more information on the required modules, visit the requirements page.
Data File Integrity Check
/data/pages/contact.xml XML Valid - OK
/data/pages/headoffice.xml XML Valid - OK
/data/pages/index.xml XML Valid - OK
/data/pages/services.xml XML Valid - OK
/data/other/404.xml XML Valid - OK
/data/other/InnovationSettings.xml XML Valid - OK
/data/other/authorization.xml XML Valid - OK
/data/other/components.xml XML Valid - OK
/data/other/plugins.xml XML Valid - OK
/data/other/website.xml XML Valid - OK
/backups/other/components.xml.bak XML Valid - OK
/backups/other/website.xml.bak XML Valid - OK
/backups/users/sheridan.xml.bak XML Valid - OK
/backups/pages/contact.bak.xml XML Valid - OK
/backups/pages/headoffice.bak.xml XML Valid - OK
/backups/pages/index.bak.xml XML Valid - OK
/backups/pages/mortgages.bak.xml XML Valid - OK
/backups/pages/services.bak.xml XML Valid - OK
Directory Permissions
/data/pages/ 0777 Writeable - OK
/data/other/ 0777 Writeable - OK
/data/other/logs/ 0777 Writeable - OK
/data/thumbs/ 0777 Writeable - OK
/data/uploads/ 0777 Writeable - OK
/data/users/ 0777 Writeable - OK
/backups/zip/ 0777 Writeable - OK
/backups/pages/ 0777 Writeable - OK
/backups/other/ 0777 Writeable - OK
/backups/users/ 0777 Writeable - OK
.htaccess Existence
/data/ Good 'Deny' file - OK
/data/uploads/ Good 'Allow' file - OK
/data/thumbs/ Good 'Allow' file - OK
/data/pages/ Good 'Deny' file - OK
/plugins/ Good 'Deny' file - OK
/data/other/ Good 'Deny' file - OK
/data/other/logs/ Good 'Deny' file - OK
/theme/ No file - OK