In the ReadMe file on that knowledgebase, I found this:
"the only way of sending the data from Matlab to LabVIEW without tempering with the MAT binary file structure is using the ASCII format"
I don't know if it would help, though, to run your MATLAB code straight from LabVIEW using the MATLAB Script.vi under the Analyze>>Mathematics>>Formula palette. Have you looked at this yet?