failure in zoho plugin in outlook 2013

failure in zoho plugin in outlook 2013

hi, I am (still)struggling with outlook 2013 integration on calender sync. I succeed in installing the zoho plugin and I can see the installation in the addin overview in the outlook settings, but the tab "zoho" fail to pop up in the tool bar. Does anyone know if the language version of outlook should have any impact on the zoho integration ?
My windows version is 7 home edition and my office package is 365 home edition. 
Really hope that someone can help me. 

regards
michael