64 bit win7 throws a wrench in the works
Some VSTi's simply do not work with 64 bit win7

What is your default midi input and output device in the preferences- midi devices area?
That is where to start.
Also if you want to use multiple VSTi's you have to uncheck the 'reroute all midi to default DXi synth'




BTW
You can only load one VSTi per track,

The top slot should display track name, then there are four slots below that - use the the top one of the four to install the VSTi

the three other slots are for different effects - if you try to load multiple synths in those slots it will crash.

Go to another track, select the port and then another synth to add a different synth ..

I do not work here, but the benefits are still awesome
Make your sound your own!