Oracle Database Discussions

Hello, I have an Oracle RAC with 3 nodes on oracle 10gR2. I want to enable partitioning option, but oracle says me that ora-00439: feature not enabled. Then I read on the web it's necessary oracle enterprise edition. I don't know if I have Enterprise Edition or Standard Edition. When I run the follow sql staments:

select * from v$version;

Don't appear the word Enterprise, then I supposed that I have standard edition, however if I run the runInstaller and I go to Installed Products, I see enterprise editions products. If I continue in the runInstaller and I select the custom edition, it's automatically select the oracle partitioning option and shows me for installing because says that it's not installed. Also, I read on the internet that transportable tablespace is a feature only for EE and it's not available for SE, however from my Enterprise manager I see the option for tablespace transportable and it's look like work.

Can anyone help me, please??