when i want to collect this category's pages
http://fa.wikipedia.org/wiki/%D8%B1%D8%AF%D9%87:%D8%AE%D9%88%D8%AF%D8%A2%D9%85%D9%88%D8%B2_%D9%88%DB%8C%DA%A9%DB%8C%E2%80%8C%D9%BE%D8%AF%DB%8C%D8%A7

it shows me this error

Unexpected non-MediaWiki exception encountered, of type "UsageException"
badtoken: Invalid token

#0 /usr/local/apache/common-local/php-1.18/includes/api/ApiBase.php(1205): ApiBase->dieUsage('Invalid token', 'badtoken')
#1 /usr/local/apache/common-local/php-1.18/includes/api/ApiMain.php(590): ApiBase->dieUsageMsg('sessionfailure')
#2 /usr/local/apache/common-local/php-1.18/includes/api/ApiMain.php(678): ApiMain->setupModule()
#3 /usr/local/apache/common-local/php-1.18/includes/api/ApiMain.php(340): ApiMain->executeAction()
#4 /usr/local/apache/common-local/php-1.18/extensions/Collection/Collection.body.php(867): ApiMain->execute()
#5 /usr/local/apache/common-local/php-1.18/extensions/Collection/Collection.body.php(225): SpecialCollection->saveCollection(Object(Title), false)
#6 /usr/local/apache/common-local/php-1.18/includes/SpecialPageFactory.php(460): SpecialCollection->execute(NULL)
#7 /usr/local/apache/common-local/php-1.18/includes/Wiki.php(224): SpecialPageFactory::executePath(Object(Title), Object(RequestContext))
#8 /usr/local/apache/common-local/php-1.18/includes/Wiki.php(624): MediaWiki->performRequest()
#9 /usr/local/apache/common-local/php-1.18/includes/Wiki.php(531): MediaWiki->main()
#10 /usr/local/apache/common-local/php-1.18/index.php(57): MediaWiki->run()
#11 /usr/local/apache/common-local/live-1.5/index.php(3): require('/usr/local/apac...')
#12 {main}

Version: unspecified
Severity: normal