Groovy - Make particular cells on form locked/not editable

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Hi Team,

We have developed a form, where we need that wherever the member is List price, that row should become read only. We have these members under the parent List Price details & we referred that. Now, the below rule is making locked the list price member which is fine, but it is also locking the revenue members which is under entirely different parent (Gross Profit->Total Revenue) which we did not refer anywhere. Please let us know where is the error. Below is the script - 

Cube cube = operation.application.getCube("OEP_FS")
Dimension accountDim = operation.application.getDimension("Account", cube)