Transfering from ftp to stars or vice versa once the accounts are linked is like doing a withdrawel. To do a withdrawel you would have first been required to deposit or at least that seems to be the situation with doing the transfer (similar to a p2p transfer, deposit would have been required).
If you have funds on stars, you can do a transfer to ftp which will count as a deposit and then should be able to ship all funds back to stars........at least it wouldn't hurt to try (unless you plan on waiting to deposit on ftp and take advantage of the deposit bonus etc).
Also could just continue to grind on ftp, they are decent and hopefully traffic will increase eventually