Importing files from Brain Vision Analyzer: error "undefined function eeglab for input arguments type char"

Hi, I am trying to import eeg files from Brain Vision Analyzer (using Transformations -> Matlab) to the eeglab and I am getting this error "undefined function eeglab for input arguments type char". Can anyone help me to solve this problem, please? I assume it is related to path but my eeglab folder is in the matlab folder, so it should be ok, no?