Payment release through work flow

Hi Friends,

I am new for work flow.

I have activated payment release work flow (WS 00400021) and same has assigned to user.

But when i am making payment through F-53, system is posting the transaction and getting posted.

I dont how to excute the transaction through work flow. But where as i have completd the configuratuion part according to configuration document.

Please help me the above scenario.

Thanks&regards,

Bramha