Make sure your gyro corrections are correct. Then you tilt the helicopter to the right, the swash should tilt left. A better way to look at it is the swash will always try to stay level. There is a setup mode in the BX to test this, as well as a mode where the swash will tilt and should remain in teh same tilt (north for example) no matter where the nose is facing.
One thing I can't stress enough, do not use trim or sub trim on your Tx with the BX. All trim should be done in the gyro, not the Tx. If you clicked the trim tabs, then this can be your problem. Make sure they are all centered and your sub trims are at 0.