Bibliography item spacing - natbib

[Srikanth]

Hi

I am using the natbib package, with natbibspacing as well as hypernat.
I have the following requirements for my references:
1) Each item is single-spaced
2) Inter-item space should be double spaced.

I also have the setspace package for some other spacing in my
document. So prior to calling \bibliography{MyReferences} (I use the
IEEEtran style), I use \singlespacing to force each item to be single
spaced - this meets requirement (1)

These are the kinds of things I have tried to meet the second
requirement (I use 10mm here as an example):
a) \setlength{\bibspacing}{10mm} or \bibspacing=10mm - no change in
either case
b) \setlength{\bibsep}{10mm} or \bibsep=10mm - no change in either
case
c) %\setlength{\itemsep}{10mm} or \itemsep=10mm - no change in either
case
d) \setstretch{2} - Changes inter-item space to 2, but unfortunately
any reference that is big enough for two lines (a lot of them are) has
double spacing between the lines of that reference; This isn't what I
want
e) If I use \doublespacing instead of \singlespacing, I get everything
(including the words in the reference) double spaced.

I'm not sure what I am doing wrong. I'd appreciate any suggestions...
Thank you
Srikanth