Trainset track compatible with switches?

[Rood]

I have the Lumberjack trainset (metal track) and bought some additional straight track and two switches left and right. The straight track seems to join the trainset track easily however the switches won`t. They only connect to the newly bought straight pieces.

Should they all join happily or do I need additional connectors?

[Joe Satnik]

They should all work together, if all Bachmann.

Pictures, please?