WS12300111 in leave request approval

Hi,

We implemented EP 7.0 with ECC 5.0 and we want to use the Leave request iView having assigned a copy of the WS12300111 workflow. I thought it would work just by making the configuration in "Specify Processing Processes for Types of Leave", but it doesn't. The leave request iview displays the confirmation that the request was sent and nothing happens....the only place where something appears to be changed is the Workplace - Sent items, where the started workflow has status "Error". No workitem appears in the UWL, the process doesn't even get to the first step in the workflow.

Please adivice! Thank you and best regards,

PS: Workflows are completely new for my knowledge