[Plugin: NextGEN Gallery] Fatal error: when trying to upload

Fatal error: Call to undefined method nggGallery::check_memory_limit() in …
i can access the settings etc but can not upload any images due to a mem error? — the overview states 32M PHP memory limit
– i’m only using 5 plugins so the load should not be excessive – i have the version 1.3.6 and the most recent stable release of WP
– any suggestions would be greatly appreciated as we’d really prefer to use the plugin