lost the inoming call link to ZoHo CRM

lost the inoming call link to ZoHo CRM

Hi there:
I suddenly lost the incoming call link to ZoHo CRM feature, hope to get help to fix this.  Detail as below:
On my android Samsung S4 phone, ZoHo used to match and bring up the leads record when one of the lead calling me;
but for some reason, it's not doing that any more, I will appreciate if any one know how to fix this problem.
Thanks
Ts 

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