Hi,  wondered if anyone could help determine why my Return URL is not working on a custom button.

 

"/a0E/e?CF00N20000001ZdDo_lkid={!Opportunity.Id}&CF00N20000001ZdDo={!Opportunity.Name}&retURL=https://emea.salesforce.com/{!Opportunity.Id}"

 

The above related to a new custom object related to the opportunity, on saving I would like it to return back to the opportunity.   I have tried lots of different options, even sending it to an external website to see what happens, but everytime it just takes me to the saved new record.

 

Is this not possible to do with custom objects, same code "retURL" works on custom event buttons.

 

Thanks for any assistance