Understanding Society User Support

Hi,

I am using the British Household Panel Survey for my research about income and well being.
I found the life satisfaction variable I am intended to use - wLFSATO on the BHPS codebook. However, after I downloaded the dataset from the UK archive, the variable is not in the dataset and I have checked every single file. Apart from the satisfaction variable, other variables does not seem to match with the website codebook either. Would you please help to locate the variables or tell me what I should do?

Thanks in advance,
Queena