Dealing with parentheses within variable names

Dear all

I'm having some problems with a data set that has parenthesis within the variable names. A example of this kind of variable names is the following:

                                fBodyGyroskewness()Z

The case is that R is having a lot of troubles to identify the variable (probably it does understand it like a function). I've tried (among other things) to remove the parenthesis from the name using the following command:

                                names(dataFrame) <- sub("()","", names(dataFrame))

but It didn't work.  Sorry if it's a silly issue but I would really appreciate if anybody could help me. Thank you very much.
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