after this i navigated to moby directory
$ cd moby/examples
$ mred ../src/moby.ss falling-ball.ss
to which i got the following output
/home/deepak/work/moby/src/moby.ss:77:44: compile: unbound identifier in module in: Loc->string
=== context ===
can u suggest wat went wrong??
is anything wrong wid my installation??????