No Input Type

Issue Summary

I have installed the fusioncharts module, and can use the cck type to quite easily create graphs, however, I have found that there is no fusioncharts input type available to me. I have several other custom input types defined, and they work fine, however I cannot build one for fusion charts. I am on drupal 6.13 and all modules up to date. Is there another module dependency that I don't know of?