CRM unable to create Activity from excel upload
I am trying hard to upload Activities to existing opportunities..
Upload goes successful but no activities are created and assigned to anyone..
|External ID||ID||Opportunity||Expected Revenue||Next Activity Summary||Next Activity Type/Display Name|
|__import__.3014||__import__.3014||send cheque to IMA||Soft Followup|
Above are my fields in excel..
Please help me getting activities created and assigned succesfuly