Getting stuck

Don't know what I'm doing wring here, I create a track, station on either side, lay a track, say 500 meters, but the train only manages to travel about 20 meters from each station before getting stuck. It can traverse back to the station but keeps getting stuck just outside the station.

Any suggestions for what I could be doing wrong?

Thanks

Changed Status from Pending to Closed

Changed Fixed In to 4461 081222