vmware blues

[david]

Installing vmware on feisty:

sudo apt-get install vmware-server

everything installs fine, but when I try to "power up" it says: error,
and stops!

I tried to install from tar-ball, but it didn't like my headers. 
It wanted linux-headers-386 (from memory) but I
have /usr/src/linux-headers-2.6.20-15-386/ which evidently isn't good
enough :(

Then I looked at re-installing from apt-get and noticed that apt-get
insists on vmware-server-kernel-modules-2.6.20-16 although i'm running
2.6.20-15  ...... maybe that's why it won't power up?

any thoughts?

thanks, David.