New With ??? About My Set Up Options

[torchsong]

Hi, new girl here with lots of questions about hardware and software.
I've read just about everything I can that is somewhat related to my situation but still have ????

I am a cellist and vocalist and want to make backing tracks to play with live and also make demo recordings on my computer. I come from the portastudio school of home recordings so the MIDI stuff is making me nuts!

Here's what I have:
imac running OS 9.2
DX7
Boss DRmkII
Behringer Eurorack
MOTU Fast Lane
Metro 5
OMS 2.3.8 grrrrrrr.....
cello with pickup (although I usually am miked for studio recording)
guitars
cables

I've tried to keep the basic set up simple but am having problems with OMS I think. Metro doesn't seem to like to work with Free MIDI.
I am also having problems playing back audio after recording a track, how am I supposed to hear what I've played to do over dubs?

BTW, I downloaded Pro Tools Free to try it out and just can't get the thing to open (memory error 1,010) so I gave up and went with Metro instead because it was inexpensive to start.

Thanks for any help, this is a great site!

[torchsong]

Thanks for your help Kaboombachuck and Levon. Unfortunately I am still without sound from my keyboard.

Everything else seems to be working ok (no more crashes) I just can't seem to get a signal when I test my set up in OMS.
I want to use the DX7 as a controller, could this be where I am running into problems? Should I just be trying to get the keyboard sound directly?
I get sound through headphones, no problem.

As far as ProTools Free goes, it was something that I thought I would try before I ended up with Metro. It would crash every time I tried to launch it so I gave up any hope of ever trying it out. I've worked with producers who use ProTools and swear by it but for me it is not to be.

Frustration has slowed down the pursuit of my MIDI dream/nightmare but I am determined to make sense of all this....