Zend and mod_write

I am not php proficient, trying to install on host earthlink, I am either getting the mod_write not enabled error, or the following:
Fatal error: Uncaught exception 'Zend_Cache_Exception' with message 'Could not determine temp directory, please specify a cache_dir manually' in /services3/webpages/h/i/historyofpleasanthill.com/public/Omeka/application/libraries/Zend/Cache.php:209 Stack trace: #0 /services3/webpages/h/i/historyofpleasanthill.com/public/Omeka/application/libraries/Zend/Cache/Backend.php(197): Zend_Cache::throwException('Could not deter...') #1 /services3/webpages/h/i/historyofpleasanthill.com/public/Omeka/application/libraries/Zend/Cache/Backend/File.php(123): Zend_Cache_Backend->getTmpDir() #2 /services3/webpages/h/i/historyofpleasanthill.com/public/Omeka/application/libraries/Zend/Cache.php(153): Zend_Cache_Backend_File->__construct(Array) #3 /services3/webpages/h/i/historyofpleasanthill.com/public/Omeka/application/libraries/Zend/Cache.php(94): Zend_Cache::_makeBackend('File', Array, false, false) #4 /services3/webpages/h/i/historyofpleasanthill.com/public/Omeka/application/libraries/Omeka/Core/Resource/Locale.php(31): Zend_Cache::fact in /services3/webpages/h/i/historyofpleasanthill.com/public/Omeka/application/libraries/Zend/Cache.php on line 209

Earthlink support looked at it and said that mod_write was enabled, so now I am stuck and hoping for a bit of help.

Brian

This particular message isn't related to mod_rewrite.

Your system doesn't seem to have a temporary directory, which Omeka/Zend is looking for to store some cache data in.

You might check with your host to make sure you have write permission to your temporary directory, or if some PHP/server settings need to be changed.