workflow could not be activated.insufficient rights for user-AX 2009

Hi,

Can somebody help me in resolving this issue, One of our user created sales order for which we have a workflow. Now another person (who has full access nothing but he is the admin) want to submit that workflow on behalf of original user.

While submitting the workflow he is getting error stating "workflow could not be activated.insufficient rights for user"

Do I need to give any permission & how & where to give. Pls assist me

Regards,

Manju