how do you change the order of accounts to recieve and send messages in Livemail ?

I have an imap email account which takes a long time to check for new email compared to my outlook and other accounts. Frustratingly, this account is always the first to get checked and I would like to make it the last account to be checked. I have tried changing the order of the accounts in the folder pane but this makes no difference. How can it be done?