setColumnHidden is not a function?

Upon attempted to hide a function with

oGrid.setColumnHidden(columnId, TRUE)

I get the error

oGrid.setColumnHidden is not a function

However Im quite sure Im using the pro version. The readme.txt in the grid directory reads:

and the top few lines of {root}/dhtmlxGrid/codebase/dhtmlxgrid.js read:

Please advise

The only way to achieve such error - use standard ( non pro ) version of the grid.
You can open ticket at support system if you need a link to the latest pro package.

Does it matter what version of the connector I use with this version of the grid?

Nope, it fully client side functionality and depends only on version of dhtmlxgrid.js