Mbox 2 with prodious 2500 and a keyboard help

[spider00rr]

I just got the mbox and I go to record the sounds I have from the prodious 2500 useing the keyboard to control it but when I go to another track to record something else to go along with the first track and then I play them to here it. It will only play one sound and not the other sound with it. for example if a record a piano riff and then record drums to go with it and press play it will only play all drums to the piano part and truns it in to drums. and if I solo eather line it will play that sound on that track. how do I get it seperate so I can record drums piano and instrument bass whatever on different tracks and then play them back so I hear the different sounds???????