it would be helpful, if you give us a complete description of what has happened: 1. Did Matlab work fine before? 2. What has happened in between? 3. Does "path" reply the expected toolbox folders? 4. Do you have read access to these folders? 5. Does WHICH find any of the toolbox functions? 6. Are you sure that there are no naming conflicts? If so, why? 7. Does Matlab provide any error messages, if yes, please post them. 8. Further ideas of what might be helpful to identify the problem?