Go to the bar on Earth again. If you can find a Coalition bribe then you're fine, if not, then you may have a problem. If worst comes to worst you could always devote that char to operations in Sirius and make another one to venture into Altiar.
(Quote) Anytime (Quote) You can't bribe the Coalition anywhere in the game but on Planet Earth (I did find an Order bribe in Wheel of Sirius once though ;)).