Error when using wavelet transform

I am working on speech recognisation .I have used dt cwt for feature extraction.But when i used the codes from toolbox in link

http://www.mathworks.in/matlabcentral/fileexchange/32086-dt-cwt-based-image-fusion

I get error

Subscript indices must either be real positive integers or logicals.

I can understand the error.But how i can use it for speech process.Is it possible to use dualtree complex wavelet transform for speech recognisation