Zoho CRM and Android - App does not allow editing of contact

Zoho CRM and Android - App does not allow editing of contact

gentlemen, 

In my signature version (Professional) functionality is provided in item Mobile Edition, which have functionality: 
- Create, Edit or Delete Records 
- Create, Edit or Delete Records in Offline Mode 

But I am not able to edit my contacts in Android App (Android version 4.4). 

Is there some setting I should carry on the webpage or is a specific problem?